Fifth Grader

Someone who falls in the prepubesent age group who is very annoying, overweight, tags along with older sibilings. and thimks they know everything.

Bob is such a fifth grader

by Detroitlions Guy 34 March 29, 2009

fifth challenge

A contest between individuals in which each participant is given a fifth of liquor of their choice. The objective is to drink the fifth before the end of a designated time period, typically the end of the night. True champions are known to use Bacardi 151.

Paul: Yo Diaz, you have 30 minutes left to finish the fifth challenge

Diaz: Shit man, that's like 5 more shots.

by PaulCP April 8, 2006

Fifth Base

Anal Sex

My girlfriend let me go to fifth base.

by Lazarus69 June 30, 2018

fifth base

The only base you can slide into where you KNOW you'll get your pants muddy.

Brian: How far'd ya get with her?

Mike: Fifth base!

Brian: Really?

Mike: Yeah, this mourning I totally had to wash the uniform.

by Brian_is_tasty July 1, 2006

fifth base

When you get past fourth base on a chick, (or on a guy if your queer). This is when you place your meat in her ass. Commonley refered to as Puerto Rican style.

Hey TJ, I fith based this chick on saturday night, Puerto Rican style. I pulled out and there was a peice of corn on my helmut.

by Kelly June 3, 2003

four fifth

a .45 pistol.

i capped yo ass with a four fifth.

by Anonymous October 5, 2003

four fifths

another word used in place of saying forty five, a colt 45 gun.

man i got in the club with the four fifths, let some shit pop off iam ready.

by bert2 July 10, 2005