Collocations for idiot - noun

babbling (esp. AmE), big, blithering, brainless, bumbling, gibbering, little, mindless, right (BrE,informal), stupid
What stupid idiot left their shoes on the stairs?

absolute, complete, real, total, utter
drunken
He was giggling like a drunken idiot.

village
He looked like the village idiot.

be, feel (BrE), feel like, look like, sound like
I felt (like) a complete idiot, standing there in front of all those people!

act like, behave like
She knew she was acting like an idiot.

call sb
She called me an idiot.

make an idiot of yourself
He's made a complete idiot of himself over this woman!