To catch the end of your penis in the zip of your trousers.
I’ve started wearing button fly jeans now. Every time I do up a zip I seem to bum the hamster. It kills the end of my todger and hurts like heck trying to get it back out again!
"Pro" cyclists-- Usually social riders, wearing lycra pants and jerseys, riding bikes worth more than a respectable motorcycle, and training on quite possibly the most inconvenient roads while people are attempting to get to work/school/home-- usually major, single lane roads-- and often not in the bike lane.
Not all "pro" (or pro-am) cyclists are bum wigglers but the ones that are, you typically find going up that tight, annoying stretch of hilly road at 15mph/20kph when you're already late for work.
That bloody Bum Wiggler with the Porsche jersey on Bridge St. showed up again. If he makes me miss the team meeting again I'm just going to run the bastard over.
Like a photo bomb but with a bum somewhere hidden in the photo.
Look at the bum in the back ground of that photo! You got photo bummed!
An asshole or someone too eager for anal
"can i copy ur homework?"
"No"
"you fuckin bum rusher"
"can i copy your homework"
"no fuck ye homework"
"you fuckin bum rusher"
This is when your bum swells up really badly and can cause huge pain. Its caught from smelling the farts of someone who already has North Korean Bum Disease. Can be treated with around 2 years of bum supplements.
Went to North Korea for a quick fuck, hope I don't catch North Korean Bum Disease.
Bumming booses is putting pretzel sticks up each others urethra. It hurts like hell.
Friend 1: Bumming booses is a hard thing to do with a small penis.
Friend 2: What the heck, man, I thought all men were created equal! I have a huge urethra!
The 11th finger that comes out of a girl's bum to enter a guy's bum while they are having sex.
The sex was pretty bland until her bum finger crept out.