1. when you love it something to hard, you gotta bum it
2. when you love bummin so much, that your cock turns blue.
3. a mixture of sex and watercolour.
I love Lionel Blair, if i ever see him i am gonna bum it blue!!
The unfortunate situation that occurs to some either during or after a trip to an African country when they experience a horrific and maddening "anal itch" from explosive travellers diarrhea. Otherwise referred to as "ass itchy and burning" and "atomic itchy bum" Often abbreviated to "AIB"
Oh man-I got back from holidays like four days ago and I have the worst African Itchy Bum ever!
TBS: Tight Bum Syndrome: the action at which some one, who is nervous, clenches their butt cheeks in anticipation of a specific anxiety/nerve inducing event. -Walking is sometimes difficult, although it does make your ass look out of this world.
ITBS: Itchy Tight Bum Syndrome: The occasional time during TBS: Tight Bum Syndrome, when your ass gets extremely. annoyingly itchy. Usually an itch that just doesn't feel right scratching on your own, so you must employ a friend to do it immediately. Or some kind of utensil.
Bob: "I don't think I have Todd, only TBS, what is ITBS?"
Todd: ITBS: Itchy Tight Bum Syndrome, when your ass cheeks are in the position of TBS, but then get extremely itchy all of a sudden. I just can't seem to scratch it properly."