Pants are on fire 

the shortened phrase of "liar liar pants on fire", means that you are lying, not telling the truth, etc.

yo I just had sex with Kim Kardashian!!" "man shut up, your pants are on fire

Pants are on fire by Thorykuleeslum February 23, 2011

my pants are on fire 

A simple phrase used to indicate that your pants are in a state of rapid rapid oxidization. YOu should use this phrase when your pants are combusting as you never know when you might have to tell a blind person. A blind person wouldn't under stand what
'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!!!!!!'

meant.

I souldn't have used that match after spilling gasoline. Now my pants are on fire...... and it BURNS!!!!!!!

my pants are on fire by Collin Miller July 20, 2003

my pants are on fire 

A statement used to point out the glaringly obvious when ones pants are, in fact, on fire.

Hey, did you know that my pants are on fire?

my pants are on fire by K N3k0 April 8, 2004

my pants are on fire 

a very serious, often life threatening condition that occurs when a guy/girl is so horny they'll fuck anything in sight.

call the fire department! i haven't had sex for over a month, and my pants are on fire!

my pants are on fire by tokyo rose February 24, 2007