Also known as ballsmacking.
This is where a guy, or several guys whip out their floppy ballsacks and teabag someone, and smack them in the face with their balls.
Oh it was horrible, last night I passed out and woke up to my boyfriend and his mates smacking my face with their hairy balls!
Dude last night we totally went faceballing and did it to some idiot on the street, should have seen their face!
Game played with smartphones with a facebook app, such like iPhone. The game consists by scrolling down eachothers friends list and picking out a random person (girls for boys, and boys for girls ) writing something or doing something (mutually agreed upon) embarrasing on their wall.
Writing "Wanna grab a cup of coffe?" to an ex with you have an infected relationship with or writing "oh my god, you are so hot" to a friends hot mom. Thats facerolling!