Finger Filter
When you finger a girl through her tights/leggings because she is on her period.
Person 1: Hey, did you finger Katherine
Person 2: Yeah man.
Person 1: Thought you said she was on her period
Person 2: Yeah I finger filtered her.
Person 2: Yeah man.
Person 1: Thought you said she was on her period
Person 2: Yeah I finger filtered her.