What is Magnum P.i.?
1.
An overt moustache (usually on a woman) that resembles the moustache of Tom Selleck. Star of Magnum P.I.
Did you see Bill's date? She had a Magnum P.I.
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2.
Participating in the Tom Selleck while either the shittee or shitter wears a Hawaiian shirt.
I took Kim on vacation to Hawaii. After 5 pina coladas she passed out and I gave her the Magnum P.I.
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3.
When a man is having anal sex with his partner and decides not to "pull-out". He nuts in her butt and then with his finger gets some of the "nut" and gives her a "Tom Selleck-type" mustache, you know...A Magnum PI
Yo, last night I was banging your girl in her ass and she asked to look like Magnum P.I., so I helped her out.
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4.
Act of sexual deviance involving one individual urinating directly into another individual's eye.
I'd never hit a man wearing glasses, but I would give him a Magnum P.I.