Sorcerer's slip
Unexpected, and sometimes unintended, but always consensual sexual entry of another person's orifice.
"I can't believe you went home with Eddie yesterday."
"I know, I gave him the sorcerer's slip."
"I thought Victoria wasn't that into you." "Me too, but then I gave her the sorcerer's slip."
"I know, I gave him the sorcerer's slip."
"I thought Victoria wasn't that into you." "Me too, but then I gave her the sorcerer's slip."