pullin' the pin 

Leaving the military. Phrase derived from the act of pulling the Safety Pin on a Hand Grenade.

"So dude, what's it been like since pullin' the pin?

pullin' the pin by Dreaded88 October 28, 2013

pulling the pin 

To smoke an illegal or controlled substance out of a hollowed out frag grenade using a mesh bowl inserted in the top, and a plastic or rubber tube protruding from a hole drilled in the bottom.

Andy: Hey man have you seen Spence?

Nance: No broski, he's in jail.

Andy: Why man?

Nance: He was caught pulling the pin!

pulling the pin by Mr. Giggly Google Goggles MAN July 25, 2010