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1 To Make a clumsy, retarted, or otherwise ungracefull move
or
2 To hyperventalate while laughing
3 to talk with food in your mouth
After she layed down on a strawberry, she was called a leib the rest of the night.

or

The math joke was so funny, Hannah started leibing.
Leib by Kittykatmeow45654 May 30, 2009
Related Words
An accidental, yet graceful (i.e. not resulting in injuries), cross of two penises usually resulting in a sonic pulse of awesomeness.
Our full length mirror broke when my bro and I were totally having a helicoptering contest and leibed all over the place.

"Wow Bro! Leib!!!!" - Two bros as they mushroom stamp and teabag their brah at the same time

I tried putting on another wristwatch and just ended up with leib
leib by Sentimental Cruelty July 20, 2011
A polar bear that is old and consists of fur that is groomed nicely and just wants a comfortable life. Mostly does work but keeps saying the youth needs to work more.
And this old, somewhat grumpy bear gets simped. Wears green glasses because why not apparently.
Leib is hot.
Leib by Pumpkinz June 17, 2022

Leibancat 

Another word for best friend.
Sweet, gentle, cute, incredible.
I love my leibancat!
Leibancat by Liizzzaarrddd March 31, 2008
Leiby is a beautiful person. Leiby always sees the good in everyone no matter what they do. When you get to know Leiby they are funny,goofy,weird,crazy,unique,loving,caring, and kind. The are also very tough and feisty.
That girl is so Leiby
Leiby by Leiby Shade November 7, 2018
16th Century philosopher and mathemtician who was a contemporary of Sir Isaac Newton. Was fucked over with regard to credit given to the pioneer of calculus. Leibniz developed the integral sign as well as developed the theoretical concepts of the derivative and integral, whereas newton mostly applied those concepts to physics. Leibniz and newton both made significant contributions and should be viewed as co-discoverers of calculus.
Leibniz should get more credit for the discovery of calculus
Leibniz by nirvanarageatm December 15, 2004