Sailor's Surprise

The act of spiking a unknowing recipitent's drink with semen.

Hey man when she wasn't lookin i took her drink to the bathroom and left her a sailor's surprise

Sailor Surprise

A mixture of period blood and semen. Usually a stain of some sort. Named because of "seamen"'s likeness to semen.

She was having her period, so I raw-dogged her and now I've got a Sailor Surprise on my sheets.