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1.
1. When a man is convinced he has fucked the living shit out of his partner, and he/she usually tells him he/she loves him shortly after. When a sex partner screams during sex as though they were being murdered.

2. After a man has sex with a woman on her period and his penis is covered in blood and resembles a murder weapon.
1. "Yo I hit her with the murder dick, now she won't leave me alone."
by Chester Steaknife September 02, 2012