verb, the act of eating out innocent girl's assholes without their consent of knowledge, usually for one's own personal pleasure.
Hey I totally Lassed that girl while she was passed out at a party, she never even knew I was lassing her, but I sure did!
by Erin Foley July 13, 2009
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Lasse is the hottest motherfucker you’ll ever meet. Just from looking at him will make you instantly start grinding on his face. Some say that Lasse has a higher IQ than Einstein, and he also has a large surprise under his pants ;). He is also rolling in e-girls...
Aaron: OMG have you seen Lasse he is so hot.
Lorenzo: Dudeeee I think I’m gay for Lasse.
Everybody else: I just creamed my jeans from looking at Lasse.
by Large Cock Man May 23, 2020
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"orrrr did ya see the tits on that lass?"
by dave August 13, 2003
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Old Northumbrian(ModernNorthern English-Lowland Scottish) origin word for Girl.

Origin from old Norse/Anglian word Laskura
That lass oertheer used to laik for York lasses Rugby League Team
by Patrick Dee On August 21, 2018
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Lasse is the definition of a really nice guy who is so awesome that if you`d count to his awesomeness, you would never get finished. Lasse is also a word for an extremely smart guy. (His IQ is over 9000)
Wow that guy is so Lasse. I wish that i could be just as Lasse as him.
by Flyin_Pig_of_Joy November 11, 2014
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"My what a nice lass she is, eh?"
"You're very right, my good friend! A fine young lady she is!"
by Dubshpee July 28, 2015
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