Heart Stamp

verb- The act of painting or inking the underside of one's scrotum, then "stamping" someone on the forehead with a print of your nuts, while they are sleeping

noun- a stamp on someone's forehead made in the above manner

Verb- Hey, I found out Bob was fucking my girl so I heart stamped him while he was sleeping.

Noun- Hey, Bob where did you get that mark on your forehead? It kind of looks like someone heart stamped you.