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?

thiefin by Kailyn Schmidt November 1, 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'!

Thiefin' by vjcast13 January 12, 2017

Thieving Gypsy 

A lonely low life slum who is homeless, avoids taxes and the bloody bastards will steal anything they can get their grubby hands on, even if its your wife. This word can be used as a noun or adjective to insult the ones who thieve.

Oi' You git back ere ya Thieving Gypsy wit ma wife!!!

Thieving Gypsy by DogThickFace May 27, 2017

thiefonce 

A name used in place of "Beyonce". A celebrity known for her lack of originality.

Michelle: Did you see that video of Beyonce copying Britney's dance moves?

Kelly: Yea, oh thiefonce. :(

thiefonce by Coney52 October 21, 2015

Thievin 

(thēv-in) .v.

: the act of taking something from another, whether it be the theft of time, items/possessions, and people in which one may be involved in any form of relationship with.

Chelsea stole my idea. She straight thievin!
How are you going to just take his girl like that? Straight thievin, you have no loyalty.

Thievin by Tom_Atoe February 5, 2014

Thievin’ Steven 

The act, during a cornhole game, of “accidentally” miscounting the score in your own favor.

“Wait, wait . . . You only have 12, not 13. Don’t pull a Thievin’ Steven.”

Thievin’ Steven by HandsomeHamburgers October 31, 2019

Peep thieving 

When you enjoy the view of something you haven't purchased or don't maintain.

They started the fountain in the cemetery down the hill last night, and I was peep thieving all evening.

Peep thieving by Plankton Tat June 8, 2017