fameux

/fa.mø/
1.
adjectiveSing

famous / well-known

the 'so‑called' or aforementioned (used to refer to something/someone already mentioned, often with irony or skepticism)

J'ai enfin vu ton fameux cousin dont tu parles tout le temps.

I finally saw that 'famous' cousin you've been talking about all the time.

Synonyms:célèbre, illustre, réputé, sacré
2.
adjectiveSing

excellent / very good / remarkable

used as an intensifier to mean considerable or strong (e.g., a 'big' storm, a 'serious' mess)

C'est un fameux gâteau que tu as fait là !

That's an excellent cake you've made there!

Synonyms:excellent, formidable, considérable, sacré
fameux - French Definition & Examples