(2) A slang abbreviation for "bunghole", meaning the anus--synonamous with asshole.
(3) verb, to mess up while doing something. Can also mean to have an accident.
(2) lick my bung, bitch!
(3) Tommy tried to fix his car, but he just bunged it up!
Also, see Bribe
"Oh, just bung it in the corner"
"Sally, what should I do with your books?"
"Bung 'em on the shelf please Barry"