What's on your mug?

a person who is unlikely to win in a competition or is at a disadvantage

He was the underdog but he came out on top anyway.

By The Return of Light Joker

1. To be under a dog.

Person A: (Gets under his dog) Look everyone! I am an underdog.

By Kaycikay

The UNDERDOG is a player or a soldier that was or is under and still fighting.

Tupac Shakur is the UNDERDOG

By oz

What TJ Kippen calls his crush

TJ : hey you look cute underdog Cyrus : ??? TJ : no homo though

By I*Made*This*Account*For*A*Meme

The act of finger banging a girl whilst wearing a Sweep hand puppet

Last night I underdogged the girlfriend. Now Sweep has a wet nose so I will use Sooty next time

By Trapper Hart