A sense of humor that tailors specifically to childish and immature words, often said without any real reason, that is adopted mainly by young children, but can be found with young teenagers as well as few adults
Person 1: stinky willy
Person 2: EHEHEHEHEHHEHEHEHEHEHEHEHHEHEHEHEHEHEHE
Person 1: you have such a poopie bum bum sense of humor
Person 2: yup
Penis bum bum is used to describe someone who is both a dickhead and/or ass hole, penis bum bum sounds far less offensive then both of these but means a great deal more.
"Omg stop annoying me!"
"No it's funny"
"GOD you're such a penis bum bum!"
6π 3π
Any flying insect which can be found hanging around the anus of cattle / sheep and / or welshmen.
Have been known to descend to feast upon shite from said critters arses.
Look at the way the bum bum fly just hangs there...
13π 10π
A cute, sweet girl that is simultaneously singing and dancing with a child-like smile on her face
That girl over there listening to the Gypsy Kings is such a bum bum hunny!
3π 1π
The old-school fifties gangster version of ass hat
And the non-mexican version of rectal sombrero
Can be used as a comeback and/or insult
See also ass hat, and rectal sombrero, also created by Lauren.
Lauren: WOW Julia you stupid
Julia: BUM BUM FEDORA!! oooo take that.
6π 4π
Spread their cheeks and diaper your secrets into it before ejaculating into it
Want to do a salem bum bum