Top Definition
A person that wants to hit every sexy lady in the world. That means a pervert.
"OMG you are a Lasse!"

"Stop being such a Lasse"
by iam2hot4u May 21, 2009
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
A guy so otherworldly intelligent, that people around him think he's a nobody, but in his head he has the secrets of the universe.
You see that guy over there? I bet he's a Lasse.
by Cr3nzer June 20, 2015
The kind of guy that would dedicate his life to maths and even go live in a cave so that he could study maths.

Lasses also knows the answer to everything, but they won't tell anyone.
Person 1: Hey, have you seen a Lasse somewhere around here? I forgot to do my maths homework.

Person 2: Try the library, I heard they set up a camp in there to study maths.

Person 1: Thanks man, I'll go have a look.

Person 2: Be careful though, they might try to convert you to become one of them.

Person 1: Ok, I'll be careful then, don't really fancy becoming a Lasse
by In_need_of_autonumber March 07, 2016
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.