아이고, 어머, 헐: Emotional Interjections & 맞장구

Two things make a Korean conversation feel warm rather than flat, and English speakers systematically underuse both. The first is the set of 감탄사 — emotional interjections like 아이고, 어머, and 헐 — that let you voice a reaction instead of narrating it. The second is 맞장구: the small agreement-noises you drop into the other person's turn to signal "I'm with you, keep going." Neither is decorative filler. Korean expects audible emotional feedback, and a listener who stays silent and still doesn't read as calm or attentive — they read as cold, bored, or disapproving, which is the opposite of what an English speaker used to quiet, polite listening usually intends.

The core interjections (감탄사)

아이고 — the multipurpose one

아이고 is the workhorse interjection, and its meaning is set almost entirely by tone. It can carry sympathy, dismay, physical fatigue, mild exasperation, relief, or simple surprise. An older person lowering themselves into a chair sighs 아이고; you comfort a tired friend with 아이고; you react to bad news with 아이고. Casual variants 아이구 and the softer 아유 cover the same ground.

Because it works across ages and situations, 아이고 is the interjection you can use most freely without misjudging the register.

어머(나) — surprise

어머 marks surprise or mild shock — "oh!", "oh my!" It is heard more often from women and reads as slightly gentle, but men use it too. The extended 어머나 is more emphatic.

헐 and 대박 — young, casual shock and awe

헐 is the sound of disbelief — "no way," "whoa," "ugh" — and 대박 ("jackpot," literally) expresses awe or amazement, good or bad: "amazing," "insane," "unbelievable." Both are young, casual, and everywhere in friend-talk, texting, and K-dramas. They are also register-marked: they clash badly in formal or business settings (more on that below).

아휴 / 에휴 — the sigh of resignation

아휴 and 에휴 are audible sighs — weariness, resignation, "sigh, here we go again." They lean tired and slightly negative.

저런 and 어떡해 — sympathy

저런 ("oh dear," "that's too bad") is a compact way to show sympathy for someone's misfortune. 어떡해 — from 어떻게 해 ("what to do") — is the go-to reaction of distressed sympathy or panic on someone's behalf: "oh no, what do we do."

맞장구: the listener's half of the conversation

Now the part learners most often miss entirely. In Korean, the listener is not supposed to sit quietly and wait for their turn. You are expected to sprinkle short 맞장구 — reactive tokens — all through the speaker's turn, roughly once every clause or two: 진짜요? ("really?"), 그래요? ("is that so?"), 맞아요 ("right / exactly"), 그러니까요 ("I know, right"), 아 네네 ("ah, yes yes"). These do the work English does with head-nods and "mm-hmm, yeah, totally" — but in Korean they are more frequent, more verbal, and genuinely load-bearing. Withhold them and the speaker starts to wonder if you disagree or aren't paying attention.

Here is a short exchange showing the backchannels doing their job — notice how the listener stays audibly present:

For the fuller inventory of these tokens and how they thread through a turn, see agreement backchannels and reaction tokens; the related expressions 그렇구나 / 그러게 / 글쎄 are covered in geureoguna, geureoge, geulsse.

Mind the register grading

The catch is that these tokens are not all equally portable. 아이고, 어머, 저런, 어떡해 are wide-register and fine with almost anyone, including elders and in semi-formal talk (아이고 is practically ageless). But 헐, 대박 are young and casual: perfect among friends, jarring in a meeting, an interview, or when speaking up to a superior. Dropping 대박 into a business conversation makes you sound like a teenager reacting to gossip. In formal settings, trade them for measured reactions — 아, 정말요?, 그렇군요, 대단하네요 — which carry the same "wow" without the slang.

Common Mistakes

1. Under-reacting — the silent listener. Nodding quietly the way you might in English reads as cold or checked-out. Add verbal 맞장구.

2. Using 헐/대박 in a formal or business setting. They are slang; up-shift to neutral reactions.

3. Saying 어떻게 when you mean 어떡해. 어떻게 is the adverb "how"; 어떡해 (= 어떻게 해) is the interjection "oh no, what do we do." They are pronounced almost alike but spelled differently, and only 어떡해 works as a standalone reaction.

4. Treating 아이고 as only sad. Learners lock 아이고 to grief and miss its everyday range — fatigue, relief, mild exasperation, even fond scolding. Let tone, not translation, set its meaning.

5. Over-narrating emotion instead of voicing it. English speakers say the equivalent of "I'm so surprised." Korean prefers to perform the surprise with an interjection.

Key Takeaways

• 감탄사 let you voice feeling: 아이고 (wide-range), 어머(나) (surprise), 헐/대박 (young awe/shock), 아휴/에휴 (weary sigh), 저런/어떡해 (sympathy).
• 맞장구 — 진짜요?, 그래요?, 맞아요, 그러니까요 — are the listener's job: drop them all through the speaker's turn to prove you're engaged.
• Silence reads as coldness, not calm. React out loud; it builds more rapport than a polished sentence.
• Watch the grading: 아이고 and 어머 travel almost anywhere, but 헐/대박 are casual slang and clash in formal or business talk.