The "back hander slander panda" is most commonly known as a sex position. Involved is preferably two males and one female, with one male performing oral sex to the female, with the male laying on his back and the female ontop while recieving anal from the second male. The second males ball would then be slapping or 'back handing' the first male on the chin.
(Male 1)Tom: Hey Lachy do you want to back hander slander panda Sophie tonight?
(Male 2)Lachy: Sure tom, I am keen.
(Male 2)Lachy: Sure tom, I am keen.
by Mendax June 23, 2014