Top definition
Anal sex or anything to do with the asshole like fingering.
Me and Sophie had some bumfun in the mcdonalds toilets.
by Pimp_who_walks_with_a_Limp September 16, 2005
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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3
Anal sex, usually referred as between two males.
"lets have some bum fun!" Terry shouted to his Father
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4
A term describing anal sex with gay men.
Well, if being a rent boy is gonna get you bum fun, Daffyd, then I'm all for it.
by Wankshaft December 04, 2005
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5
Bum=homeless person - Fun=fun

1 Bum Fun is when you go out and torment the homeless for your own amusement

2bum fun is intended for people to see how good there life really is by making fun of the homeless.
I went out and had some bum fun today.

it made me realize that my life is much better than i thought.
by F bibles October 31, 2009
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