1. The act of revenge.
2. To return to a previous state.
1. As in the game of punch buggy
, one would say "punch buggy, no backsies!" If you are punched back, thats defying the rule of no backsies.
2. Guy: I fucked a stupid cunt
now whenever I talk to her she thinks she's my girlfriend. Once you fuck a bitch, there's no backsies.