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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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 20, 2018
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"orrrr did ya see the tits on that lass?"
by dave August 12, 2003
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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 27, 2015
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Lasse is one of the bestest people you'll ever meet, he is a fantastic gamer and overall the best guy ever. If you need someone to talk to, he'll pause the game just for you. Even if it's multiplayer, Isn't that crazy?? He is a really shy guy though, and very sensitive. He is really trustworthy and will NEVER leak a secret you've told him, you can tell him about anything. He won't judge you for what you look like or what you like, he loves to have internet friends but if you wanna meet up with him he'll be really scared. So if you ever meet with a Lasse, make sure to give him a gift and the biggest hug in history! He is also very adorable, so be careful of his adorableness!
Hey! Heard you met up with Lasse yesterday, how did it go?

Oh it went amazing! We went to his house and played videogames all night! I gave him a gift and he really really really loved it! He gave me the sweetest hug and had so much fun. Lasse is truly adorable.
by HereAreTheTueFacts May 25, 2019
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