When a chick comes up behind you, clothed or unclothed, and her boobs rest over your shoulders and around your neck resembling an emergency life-vest.
While trapped in a cave, Grant stayed alive by falling asleep in the security and warmth of his best friend's lifejacket; even though it was a little gay.
by cowtipn January 24, 2007
One who thinks he's good at writing music but writes poor lyrics cannot sing, thus looking ridiculous to anyone who doesn't eat their ass.
Whose up next?
Oh you know, Lifejacket.
Oh fuck, not again!
by Lifejacket April 25, 2006
When you wrap your dick in foam and take it for a swim
I THOUGHT MY DICK WAS GOING TO DROWN SO I PUT ON MY PENIS LIFEJACKET
by DICKYMCDICKSTER February 26, 2014