A person who is so adept at sex or blowjobs, the recipient of their talents contracts temporary amnesia. Therefore providing the illusion of their sperm being stolen.
"Dude, this girl gave me the most insane blowjob last night. I passed out and couldn't remember my name, she's a total spermburglar."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"