abbreviation for butt piss (chronic diarrhea that literally shoots from the rear in liquid form). In Oregon trail days it would have been a prime indicator of the onslaught of dysentary. Often accompanied by machine gun like fart sequences. Also occurs when subjected to an extremely low carb diet. Food (or remnants of it) may be semi-identifiable when the process is completed. If ignored, may result in a hardcore shart.
I'm going to have to refrain from Long John Silver's tonight because I really don't want to have a BP attack while we're at the bar.

I'm sorry but I really need you to cover for me before this BP transitions into a shart.
by sarah Binny July 11, 2008
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an acronym for bitch please for all the texters
refresher on original definition:
phrase originally used by pimps in the 70's used to express disbelief and authority towards one with the audacity to try your ass. Also said to stupid people who dare try you
He says: "I'll bust yo monkey ass"

You say: "Huh?! Bitch please"

Ho(e) says: "I'm sorry, but I couldn't get no money daddy!"

Pimp slaps her and says: "Bitch please! Now go get me my money!"
Now once again for the texting crowd:

Ho (e) texts: I ain't got no $ daddy
Pimp texts: BP! Go get me my $
by Momma74 February 5, 2010
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An ejaculation resembling the BP oil leak in force, total volume and duration.
During sex yesterday, I decided to ejaculate on my girlfriend and I totally BP'd her; the entire roll of paper towels wasn't enough clean her off.
by The Jaliactica January 19, 2011
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"Dude, you're low on petrol, there's a BP there why don't you fill up?"
by Soiled Undergarment August 13, 2003
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Paula's got BPS! Fucking her is like throwing a hot dog down a highway!
by Nail Polish Gangsta February 3, 2016
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BP

It is used to refer to spending a lot of money, making a mess, or stuffing up very badly.
Oh man, I really did a BP on that one. (I really stuffed up.)

It's going to take me all day to clean this mess up. It's a real BP!

Tidy up your room! It looks like BP was in it!

No, I didn't pass the exam. In fact I made a complete BP of it.
by peridos June 18, 2010
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