look up any word, like ratchet:
 
3.
Meaningless word, can mean anything
Yo dawg! Check out da FLIR!

Im bout to bus yo punk ass in da FLIR!

Get dat FLIR ot har ya'll african-american siblings!
by Dawggy December 05, 2003
 
1.
Forward Looking Infra-Red, glasses for night vision.
Even if you see somebody with flir, it doesn't mean it's him.
by alvaropikolino November 17, 2010
 
2.
Flirting not ended by a cuppa T.
Flir as IT were can cause more than a stir.
by Hercolena Oliver June 28, 2010