smackback 

When you are boning your smoking hot girlfriend doggie or in any kind of style from behind and she smacks her arse back onto your phallus in sync with your mighty thrusts, which in turn creates a satisfying slapping sound.

Lexi gave me a good smackback last night.

smackback by gabeisaac December 5, 2016

smackback 

A smack back is whatever you want it to be. Usually relating to someone or something that is wack, lame, weak, or ugly. Can also be used as a greeting term. Like what up nigga, dog, playa, killah, ninja, ect. Smackback is a word such as bad. Can be used for good or evil. So basically its anything u want it to be.

What up Smackback? Look at this mutha***** smackback lol

smackback by Kyser Soze December 1, 2007

SmackJack

A Person Who Smokes And Deals Crack In Their Free Time.
Usually A Big Fat Black Guy.

Person A: Oi Bench, Another SmackJack Is Coming Over.
Person B: Quick, Stab That Mofo And Nick His Wallet!
SmackJack: **Gets Stabbed**
Person A: Shame

SmackJack by Henryy Morgann March 18, 2008

New Jersey Slickback

A sexual act in which one participant elects to receive an organic shampoo alternative generally provided by a group of three or more men pleasuring themselves manually. Once all of the sperm donors have made their contribution the recipients hair is brushed back resembling the common New Jersey “guido” hairstyle.

See Also

Head and Shoulders Penis Pullers

Person 1: Hey did you see Elias’s new hairdo?

Person 2: Yeah! I heard he went to Nicky Clips and the boys hooked him up with a New Jersey slickback!

New Jersey Slickback by HeadAndShouldersPenisPuller January 19, 2020

A Pimp Named Slickback 

The name of minor character appearing on the Boondocks episode "Guess Hoes Coming to Dinner". He hates being called "slickback" for short, claiming that his name has to be said all the way through, like A Tribe Called Quest.

Also know as "a nigga in a purple suit".

http://youtube.com/watch?v=kkt490I0_2I

My name is A Pimp Named Slickback, and I believe I may have misplaced some merchandise at this residence.

A Pimp Named Slickback by a pimp named A Pimp Named Slickback September 18, 2008

Slackback 

A slackback is referring to a day when you are slacking off from dialing and selling. It can also mean a day that you did not post any new sales on Slack.

Becky "I just got a chargeback."
Mandy "Girl, I hear you, but you have seen your slackbacks? Get rid of those days and the chargeback will disappear."

Slackback by Insurance Guru November 9, 2022

Stackpack 

A pound of marijuana or other enticing substances for 1000$.

Damn that stackpack was straight mids.

Stackpack by HighLyfeStyle November 7, 2018