In Youtube, it's where you have to post a video telling 5 facts about yourself and then tag 5 more people.

A popular game played by children where one child, who is the tagger or is It attempts to touch another child, making them It, also called it.

A Social network full of Old guys pretending to be young bisexual girls who say they like girls more than boys.

"Tagging" or "Tagged" - When you have sex with a girl and then take a picture of her naked, then wait a few days and post it to Facebook and tag her and all your mutual friends.

A writer's unique signature with ink or a spraypaint can.

Tags are your signiture on walls or object. it is done with style to show your skill and represents you. tags that just scribble looking is a waste of time and ruins graff for everyone and are a bunch of dumbasses.

Asking tag that to another guy means, when you see a girl walk by, you yell "tag that?" The guy then answers by saying yes or no. This is asking the question would u hit, fuck that girl! Used by home depot employees when fine customers walk by. This disguises that they are perverts