The touching of one smokers lit cigarette to another's unlit cigarette with both cigs still in their respective owner's mouths. Used to light up in the absence of a lighter.
Dude 1: Got a light?
Dude 2: Nah, we can butt kiss though.
Dude 1: Gay, but do want a smoke.
The art of taking ones lips to the rim of another individuals well seasoned sphincter for a period of time long enough to flavor the participants lips.
Gavin decided after some foreplay to give <strangers name> a butt flavored kiss before he moved onto <strangers name>s chubby mountains for a taste of her salt water lake.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.