When you look at someones Rear end and notice its not as smooth and Delicate as it should be.

Also, when their derriere is guininely not normal.

Sometime used as an expression to shout when angry.

Finally, it can be used as an insult. (similar to Ass-hole)
Dude, her curves caught my eye until i noticed her Tarp Ass.

"Dayyyyum Ray Jay, Did you see her tarp ass."
"That just ain't right"

TARP ASS! I just got stuck hanging out with all these hipsters.

You are such a tarp ass. i cant believe you would goto chipotle and not invite us.
by 12345wes October 23, 2010
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A sick way to get barreled when surf conditions are less than favorable.

Your bros lay out then pull corners of an extra large blue tarp to create a wave and you skate through it.

You feel like your getting shacked but you're shredding on LAND.
Guy #1: BRO its sooooo flat today...sucks man!

Guy #2 :Naw Dude! Its chill. Were gonna shred the gnar on the street today.
Guy #1 : You dont mean....
Guy #2 : yea man were doin it.... Tarp Surfing!!!
by grommie15 November 10, 2010
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Some retarded bullshit "phrase" used by the idiots that populate the Random Nonsense forum on the Day of Defeat official website. It makes absolutely no sense and is beyond retarded. Using 'si' instead of 'is', is no longer funny. It became unfunny after JeffK's popularity died out 3 years ago. Please stop emulating him. It's really, really dumb. Thanks.
si tarp!! lolol! i'm an unfunny faggot with an extremely undersized penis! help!!!!
by KYX! February 6, 2003
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An excess of scrotal skin hanging from the scrotum.

The male version of beef curtains.
Dude, Brittany was licking my gooch last night and she got lost in my beef tarp.
by theguy2687 December 2, 2010
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Famous Admiral Ackbar saying: "It's a trap" --> si a trap --> si tarp!
Run, shell si coming with the banstick! SI TARP!
by EpleMOS February 5, 2003
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Don't forget to put a banana tarp in before banging Em bro.
by Bigkoop95 May 22, 2014
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