"pic for pic?" basically means the person who askedthe question wants to swap nudes like a boy sends a picture of his penis and in return gets a picture of the girls breasts and vagina or it could even be just one of the two. (preferably over snapchat so you know if the person has saved them)
boy "pic for pic?"
girl "yeah sure!"
(-(girl sendsnude, boy sends nude back)-)
boy "thanks!"
girl "no problem!"
By Millie
Pic
Pic is short for picture. Used to describe any photograph or picture posted on the internet. Once it's on the internet, it's a pic.