When you eat regular food and it makes you sick because you are temperamental. It can even make you bleed out the bum for no apparent reason. Regular people can eat the same thing and be fine.
I ate dinner last night, nothing out of the ordinary, and it gave me Gurdy Bum, I have no idea why, its so grosse and hurts. Why isn't anyone else sick today??
Called such due the way the clothing material around a woman's vagina gets swallowed up by her flappy lips, creating what is often known simply as "camel-toe". An image reminiscent of a "scrum" in the game Rugby, where in trying to achieve control of the ball, both teams huddle into one small area, much in the same way the material around a woman's bearded oyster get's huddled into her beef curtains, creating the Front Bum Scrum.
"Hey, Sally! How's it goi.... woahhh..... nice front bum scrum you got going on there ;)"
"Oh my god, did you see Jenna at work today? She like, totally had a front bum scrum happening aaaaall day. Don't even try and tell me she didn't notice!"
someone who is particulay fat and/or retarded(not in the offensive way:)
aylas fat chubby sister is a lardo-bum
bUM bUM bE dUM bUM bUM bU dUM dUM
Rihanna: Bum Bum Be Dum Bum Bum Bu Dum Dum
A group of lads: Generally around 4-6 members of a group that find degenerate, sexist and outright narcissistic humour funnier than your nan's clit.
'See those losers over there'
'Yeah, they look like bum babies'
I ate too much chilli last night and spent all this morning giving birth to Bum Babies.