yernk Share definition Flag 1) to yoink (steal) 2) to yoink (masturbate) 1) He yernked a french fry from his buddy's plate. 2) His mother barged in and caught him yernking to Playboy. yernk by Kato165 September 22, 2006 0 0 Get merch Get the yernk mug. Buy Now — $32.95 See more merch