(=what people say, do, write) truc m
→ He said some stuff about what wonderful parents they were.
→ I didn't listen to that boring stuff about the economy at the beginning.
There's some stuff about him on this website. Il y a un truc sur lui sur ce site.
I don't believe in all that stuff. Je ne crois pas en tous ces trucs.
to know one's stuff connaître son affaire