A Captain Munnerlyn occurs when you take a shit on a girl's chest (preferably during or after sex), and then immediately get up and salute it.
You MUST salute the shit. Otherwise, it's just a Boston Pancake.
**Captain Munnerlyn is also the name of a current Carolina Panthers cornerback**
Guy 1: Dude, you took that bitch home last night. You get any? She was fuckin wasted!
Guy 2: I know, dude, me too. I fucked her and then gave her a Captain Munnerlyn!
Guy 1: YES!!! You're one sick motherfucker!!