Whats the best line to take here?

[keikiwai]

if this is an aggressive table i will often donk the flop, as i am likely to get raise by overpairs and hands like AT from CO, and then i can push

given the way you played it i like a nice big cr... you lose BB and CO but villain has 5 outer (like AT or JJ), so your hand is somewhat vulnerable, so i try and get it all in right now

overbet means overpair, overbluff, or just annoyed at 3 players still in the pot... i don't give it too much thought vs. an unknown, but i'll make a not when i see what he has