look up any word, like bukkake:
 
1.
When you a sleep with a girl, wait till she falls asleep, then steal her money and cum in her purse.
Guy 1: "Remember that fat chick I went home with the other night?"
Guy 2: "Yea"
Guy 1: "You'll be happy to know I sneakthiefed her. Now we can pay the rent."
by Sneakthiefer May 02, 2009
 
2.
A sneak-thief is any type of stealthy, ninjaesque, tricksy, pickpockety character in Skyrim. Hold Guards spend much of their time talking down to sneak-thieves.
"Hands to yourself, sneak-thief."
by Aghabajab February 13, 2012