A person over 25 who rocks out with his friends and sing songs no one knows because they made them themselves and screams them to a crowd of people at their local bar.
Yo! Dude that performance was sick! Middle age metal is sick!
The act of thinking something through in your mind, usually a phrase or sentence, before actually saying it. This is usually advised by someone when a person starts spurting out random thoughts that make absolutely no sense, and add no value to the current conversation.
Guy 1: Sometimes for to being smarter, is for to being deader.
Guy 2: Dude, first you've got to mentalate it, then put it out.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.