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1.
When gas is expelled from your body onto someones lap.
I was sitting so nicely on her lap when I was pulling a Leah. It was a smelly one. Quiet though.
by windward November 19, 2013
 
2.
when your hand awkwardly ends up touching someones butt, done when walking and completely unintentional.

" dude, stop pulling a Leah on me!"
When ever we walk to class together, Shriya always ends up pulling a Leah on me!
by lover613 October 31, 2011
 
3.
when you find one of your friends giving someone oral sex in your house
ME: *opens door*
THEM: "SHIT!!!"
ME: "Dude!? What the fuck man? Get out of my room! Stop pulling a leah!!!"
by Tarryn November 03, 2005