Wpadnij jutro.

Here, wpadnij means drop by, come over, or stop in.

The verb wpaść can literally mean things like fall into in other contexts, but in everyday speech it often means to drop by / pop in for a visit.

So Wpadnij jutro is a natural, friendly way to say:

• Drop by tomorrow
• Come over tomorrow
• Stop by tomorrow

Wpadnij is the imperative form, used for giving an invitation, suggestion, or command.

More specifically, it is:

• 2nd person singular
• informal
• from the verb wpaść

So it is something you say to one person you address as ty.

This is about aspect, which is very important in Polish.

• wpaść is perfective
• wpadać is imperfective

The imperative wpadnij suggests one completed visit:
Drop by tomorrow.

That fits well because jutro refers to one specific occasion.

By contrast, wpadaj can sound more like:

• drop by sometime
• keep dropping by
• a more ongoing/repeated/casual idea

So in Wpadnij jutro, the perfective form is the natural choice.

It is informal.

Wpadnij is used with:

• a friend
• a family member
• someone you know well
• a child

It is not the normal form for speaking politely to one person in formal situations.

More formal alternatives would be things like:

• Proszę wpaść jutro.
• Niech pan wpadnie jutro.
• Niech pani wpadnie jutro.

And if you are talking to more than one person informally, you would say:

• Wpadnijcie jutro.

Grammatically, it is an imperative, but in real usage it often sounds like a friendly invitation rather than a strict command.

Depending on tone, it can mean:

• Come by tomorrow!
• Do drop in tomorrow.
• Why don’t you come over tomorrow?

Polish uses the imperative quite naturally in invitations, so it does not automatically sound harsh.

If you want to make it softer, you can add extra words, for example:

• Wpadnij jutro, jeśli masz czas. — Drop by tomorrow if you have time.
• Może wpadnij jutro. — Maybe come by tomorrow.

Yes, you can.

Both are correct:

• Wpadnij jutro.
• Jutro wpadnij.

The difference is mainly emphasis.

• Wpadnij jutro = neutral, natural word order
• Jutro wpadnij = extra focus on tomorrow

In everyday speech, Wpadnij jutro is probably the most straightforward version.

No. In Polish, subject pronouns are often omitted because the verb form already shows who the subject is.

So:

• Wpadnij jutro. = You (singular, informal), drop by tomorrow.

Adding ty is possible, but it usually adds emphasis, contrast, or emotion:

• Ty wpadnij jutro, a on niech przyjdzie dziś.
  You come tomorrow, and let him come today.

Normally, you would just say Wpadnij jutro.

Jutro means tomorrow.

It is an adverb of time, and in this sentence it tells you when the person should come by.

So the structure is very simple:

• Wpadnij = drop by / come over
• jutro = tomorrow

A rough pronunciation is:

FPAD-neey YOO-troh

A few helpful points:

• w usually sounds like English v, but before the voiceless p it is often heard more like f
• j sounds like English y
• ju in jutro sounds like yoo
• r in Polish is usually rolled or tapped

So wpadnij may sound a bit like fpad-neey.

No. That is only one of its common meanings.

Depending on context, wpaść can also mean things like:

• to fall into
• to rush in
• to pop in
• to come up with / hit upon in some expressions

But in Wpadnij jutro, the meaning is clearly the conversational one:
drop by / come over tomorrow.

This is a good example of how Polish verbs often have a literal meaning and also a very common idiomatic everyday meaning.

Yes, very often.

Wpaść often suggests a casual, sometimes fairly short visit — like popping in or dropping by.

It does not strictly require the visit to be short, but it usually sounds lighter and less formal than verbs like:

• przyjść — come
• odwiedzić — visit

So Wpadnij jutro often feels like: Come by tomorrow for a bit.

Depending on tone and context, good translations include:

• Drop by tomorrow.
• Come over tomorrow.
• Stop by tomorrow.
• Pop in tomorrow.

The best choice is often Drop by tomorrow or Come over tomorrow, because they match the friendly, casual tone well.