Four or more friends jerking off onto a car. In most cases there is a couple having sex in the car and one of the parties involved invited the hoard of mastrubsting friends and the other party was not forewarned.
I'm so glad we bucarked last night. I think I love you.
"Did you see the look on Michelle's face last night when we bucarked all over her Buick! "
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.