To be fuckin' or messing with someone's head, or leading someone on.
Girl you been jankin me all day time.
by s.wood & kmuldawg November 15, 2007
To make fun of, clown, or cappin.
Listen cuz yesterday I was jankin on Barry so hard I thought he was gonna pull a Curt Cobain.
by almega86 July 13, 2005
to steal or rob, also to be hating.
while playing a video game and someone steals your kill(also known as a KJ) you can yell "man, why you be jankin'"
by johan ciznero December 19, 2009