Teman laki-laki saya adalah penggemar podcast sains di saluran favoritnya.

Teman laki-laki literally means male friend. It only says the friend is male; it does not necessarily mean boyfriend.

If you want to clearly say boyfriend, you would usually use pacar (or in informal speech, cowok for boyfriend, cewek for girlfriend). So:

• Teman laki-laki saya = my male friend
• Pacar saya = my boyfriend / my girlfriend (gender-neutral word for romantic partner)

In Indonesian, possessive pronouns like saya (my) usually come after the noun:

• teman saya = my friend
• teman laki-laki saya = my male friend

So the pattern is:
[thing] + saya = my [thing]

Putting saya before the noun (saya teman laki-laki) would be wrong or at least very unnatural in this context.

Adalah works like a linking verb between the subject and a noun phrase, similar to “is/are” in English, especially in more formal writing:

• Teman laki-laki saya adalah penggemar podcast sains…
  = My male friend is a fan of science podcasts…

In many everyday sentences, adalah can be omitted without changing the meaning:

• Teman laki-laki saya penggemar podcast sains di saluran favoritnya.

This is natural in speech and informal writing. So in this sentence, adalah is optional and makes the sentence a bit more formal or clear.

Penggemar means fan (as a noun) or enthusiast:

• penggemar musik = music fan
• penggemar podcast sains = fan of science podcasts

Suka is a verb/adjective meaning to like:

• Saya suka podcast sains. = I like science podcasts.

So:

• Dia penggemar podcast sains. = He is a fan of science podcasts.
• Dia suka podcast sains. = He likes science podcasts.

The idea is similar, but penggemar sounds stronger and is a noun, not a verb.

Indonesian usually does not mark plurals on nouns. Podcast sains can mean:

• a science podcast
• science podcasts (in general)

The context tells you which is intended. In this sentence, penggemar podcast sains most naturally means a fan of science podcasts in general, not just one specific podcast.

If you really want to emphasize plurality, you can say:

• banyak podcast sains = many science podcasts
• berbagai podcast sains = various science podcasts

Di is a preposition meaning in / at / on depending on context.
Saluran = channel (e.g., YouTube channel, TV channel, podcast channel).
Favoritnya = his/her favorite.

So di saluran favoritnya literally is:

• di = on/at
• saluran = channel
• favoritnya = his favorite

→ on his favorite channel

Using di here is normal, just like di YouTube, di TV, di Spotify, etc.

The suffix -nya has several uses, but here it is a third-person possessive: his/her/its/their (singular or plural, gender-neutral).

• favoritnya = his favorite / her favorite / their favorite
• saluran favoritnya = his favorite channel (or her/their favorite channel)

How do we know it’s his? From context: the only clear third person in the sentence is teman laki-laki saya (my male friend). So favoritnya naturally refers back to that friend:

• Teman laki-laki saya … di saluran favoritnya.
  = My male friend … on his favorite channel.

If we wanted to say my favorite channel, we’d normally say:

• saluran favorit saya (more formal/neutral)
• saluran favoritku (informal)

The order in Indonesian is:

[noun] + [adjective / descriptor / possessor]

So:

• saluran = channel (noun)
• favorit = favorite (adjective, borrowed from English)
• -nya = his/her (possessive marker)

Combined:

• saluran favoritnya = his favorite channel

Literally: channel favorite-his.
Adjectives and possessive markers follow the noun they describe.

No, laki-laki teman saya is not a natural way to say my male friend.

The normal pattern is:

• teman laki-laki saya = my male friend
  
  • teman = friend
  • laki-laki = male
  • saya = my

If you said laki-laki teman saya, it sounds like the man of my friend / my friend’s man, which is confusing and not what you want.

All can relate to males, but the tone/register is different:

• laki-laki

  • General, neutral word for male
  • Used in teman laki-laki (male friend), orang laki-laki (a man)

• pria

  • More formal/polite; often used in media, public signs, or formal writing
  • pria dan wanita = men and women

• cowok

  • Colloquial/informal slang for guy / boyfriend
  • cowok saya = my boyfriend (informal)

In this sentence, teman laki-laki saya is neutral and clear.

Yes, you can say:

• Teman laki-laki saya adalah seorang penggemar podcast sains di saluran favoritnya.

Seorang is a classifier used with people, similar to “a / one (person who is)”.
Adding seorang emphasizes that he is a fan (one individual fan):

• Without seorang: Dia penggemar podcast sains.
• With seorang: Dia seorang penggemar podcast sains. (slightly more formal/emphatic)

Both are grammatically correct; in everyday speech, people often omit seorang.