Based on the monsters inc. reference, but used instead in real life when you see a good arse on a female.
You're out in town with your mates and you clock a 9/10 arse but none of your mates have spotted it. In order to convey the message without suspicion arising from the girl herself or other members of the public the code 2319 is used.
by Syko141 May 15, 2016
Get the 2319mug.