2.5

A rent-a-cop, security guard at the mall, half of a 5.0

The 2.5 yelled at me for loitering out front of the mall even though i was smoking.

by Knotfal JOe April 28, 2008

2.5 D

an image with characteristics of 2 dimensional and 3 dimensional images

The new game has 2.5 D graphics.

by The Return of Light Joker August 24, 2008

5&1/2 pack

when someone has abs that are slightly slanted or uneven, appearing as if half an ab is missing

never make fun of someone for having a 5&1/2 pack.
1. they will endlessly venture for their missing and elusive half-ab, ultimately leading to their demise
2. They still have 5&1/2 more abs than you

by cheetaela October 23, 2013

Number 2.5

When your standing there doing a piss and you feel a fart coming on but instead you shart yourself and now you have to sit down on the toilet to finish your shit whilst cleaning up the mess in your undies.

mate, why were you in the toilet so long?

I went in to do a piss and ended up cleaning myself up, bloody done a number 2.5 (two and a half)..

by Wayne-Car May 12, 2017

Base 2.5

Base 2.5 uses powers of 2.5 for the numbers, it is considered binary and Base 5 at the same time.

Oh look! Base 2.5 isn't used! What a bad day!

by MandullorTheBEEKER October 31, 2021

2-5

A sort of Area Code for Landova (Landover) Located in Prince George's County, Maryland. It is often shouted out in gogo music.

Reppin dat 2-5 4 Lyfe.

by C-Boss January 17, 2008

2/5

A hairstyle worn by emo kids where two-fifths of their face is obstructed by their hair.

AJ: I went to the Fall Out Boy concert last night.
Thomas: How many 2/5's did you punch
AJ: Me? 3. Daniel? 8.
Thomas: Tits.

by Elite CAT May 8, 2008