n. A boring, french, muffin-esque subsitute for the croissant. Usually eaten by boring, croissant-hating people.
"Brian eats Brioches. He's such a croissant hater."
"Pass me the Brioche, dear." "What, the muffin?" "No, the thing that looks like a muffin but isn't."
When a man tries to engage in intercourse, but cannot seal the deal due to having a flaccid penis induced by excessive amounts of alcohol/drugs. Usually resembling a brioche roll.
Man 1: 'Hey man, did you shag her last night'
Man 2: 'Nah man, that bag of sniff gave me a proper brioche cock'