(verb) When a girl or boy you have been on a few dates with decides they just want to be a friend. Once you are friended you are not allowed to be romantically interested in them. Friending can appear to happen without warning.
Two very good friends that share in sexual acts with eachother with no emotional connection or boyfriend-girlfriendlabel. Just engaging in the act of sex for fun.
"We fucked, but we didn't date. It was just a friends with benefits type thing, don't worry about it."