underfile

other party in a pedo relationship

guy1: isnt she dating a 20 yr old
guy2: yah shes so an underfile

by heart.break.breakfast. November 25, 2010

undefined

When you use Javascript and confused this between null and 0

undefined == null // true
undefined === null // false
// this is js

by katetem January 19, 2018

underpinning

Foundation of ones ideas

She told him why she is not interested in him underpinning it with her religious beliefs.

by Otolorin November 9, 2018

the underlying filth

the dark matter that builds up uner your toenail after 3 months of avoidance, not to mention it smells like rotten mayo the dwells in liklyness of teste satchel.

you smell like the underlying filth , i want to kill my whole family

by oren November 6, 2004

Underland

The real name of Wonderland in Alice In Wonderland, alice just thought it was Wonderland when she was little and mis-pronounced it. You can figure this out of you watch Alice In Wonderland the newest one, when the caterpiller is talking to alice at the palace at night.

Caterpillar: This place is actually called Underland, you just said Wonderland when you were little

by Owl City's Number 1 Fan :D April 12, 2010

Undermind

Noun (plural Underminds)

(underminded, underminding, underminder)

To Think, Spy, Eavesdrop, Outwit, and Prank on your enemies.

Kevin did Underminded his Arch-Rivals Harry and Marv.

by MikeKal July 26, 2009

underneathisim

When a person's lower jaw sticks out further than their top jaw.

Benjamin Franklin

by Anonymous October 10, 2003