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To manta ray someone, you must catch them off guard, usually after somebody goats/bulldogs you....
You casually smile and say " you ever seen a mantaray"
and then with two hands grab the foreskin of your balls and fold them over your dick all the way up to your pant line or even belly button...

Note: few can actually pull of the manta ray. Very large balls are necessary
Andrew: dude, Mike passed out cold

Moses: I should teabag him and send it to his mom

Charles: ....or I could give him the manta ray
by TotallyTrippin99 September 07, 2010
The douchebags that destroyed humanities respect for australians and wilderness shows.
Person A: Whens the new badass Steve Irwin animal raping show gonna air?

Person B: Havent you heard? Some douchebag manta ray killed him.

Person A: Oh... Whos gonna ass rape those alligators now?
by Too-much-work July 10, 2010
An object that swims through the air in someone's periph.
"It's a manta ray!"
"Look at dat manta ray!"
"This is the NEW manta ray!"
by Roger Joules March 27, 2008
the appearance of a manta ray's mouth in the vaginal region produced when a husky woman wears spandex or any other tight fitting lightweight material.
nice bike shorts tubby, it looks like your smuggling a manta ray
by Doug W. February 12, 2008
1.To hold your legs up in the air in the shape of a Manta Rays Wings.

2. A Drunken Mistake

3.Toilet Paper?

Manta Ray
by Coastboy March 12, 2009