thiefin

1. When you are borrowing something or stealing something from someone and you tell them
2. When you grab something in a sneaky manner (used as "thief")

1. I'm thiefin you're computer, man
2. Did you just see Alena thief that chair?

by Kailyn Schmidt October 17, 2007

Thiefin'

When you are trying to get a girl and your friend is hitting on her when he knows you like her

Yo man, that's my girl! Why you gotta be thiefin'!

by vjcast13 January 12, 2017