Undeniable class. Upscale people always drink with their pinky out, hence the name. This can be used to describe something, or used in place of "goodbye." When used the second way, it is akin to Ron Burgundy's "Stay Classy."
"Hey man, I got my car painted." guy 1
"Oh really man?" guy 2
"Yeah, pearlescent white." guy 1
"Dude, sounds pinky out." guy 2
"Later, man." guy 1
"Pinky out, bro." guy 2.
55👍 21👎