Jack

A placeholder in the Urban Dictionary for most sentence examples, it’s also a common name.

Jack: Hi, I’m Jack.
Matt: Hi Jack!

by littleeooo March 21, 2024

Jimmi-Jacked

The Universe's style of payback
Or Karma's brother.

“Man, I can't believe that out of all these people I'm the one that gets arrested. I've been Jimmi-Jacked".

by TrickyT March 27, 2024

Jack Daniel Miller

The Jack Daniel Miller is when you pour half a bottle of expired refrigerated Jack Daniels inside a gay man's asshole and proceed to pound him whilst screaming in a high pitch voice "Stay Frosty!" Minecraft music must also play in the background.

"Yo! He looks like shit!"

"Yeah bro I heard that he got Jack Daniel Miller'd!"

"No way bro that's fucked!"

by ktjones123 March 28, 2024

jack in the box

When a person masturbates in public a public setting (class, at work, etc) whilst hiding it under their desk or clothing.

“Did you hear about Jared? The teacher caught him pulling a jack in the box during the lecture!”

by anonymous March 29, 2024

Jack Zaaa

Jack Zaaa is the guy with so much aura he gets all the black huzzz with no issues and his arms are bigger than yours!

Jack Zaaa has so much aura he stole ur bitch

by Aura king September 23, 2025

Slack jacking

When someone takes over a thread on the Slack messaging app for their own purpose

I was talking to Mark in the update channel in Slack and the entire sales team decided slack jacking would be a good idea to discuss how to sell it.

by FRITGuru September 24, 2025

Jack

Most unsuccessful man you will ever meet.

His name must be Jack, kid can't win

by mikeenglish2015 September 28, 2025