A state of extreme intoxication, often accompanied by the removal of all clothing and loss of consciousness in a public environment.
Also "borthed up", similar usage to "fucked up"
Man 1: Were you wasted
or what last night?
Man 2: Oh mate, I got borthed up, drank
a coupla boxes of beer and took my pants of at Seaworld
Man 1: Sounds like you were well borthed
Teen 1: Did you see how borthed Jules was at the party last night?
Teen 2: Most borthed cunt
round, fookin 'ell
Gentleman: In my humble opinion, birth of your first child is a solid gold reason to get borthed up.