Johnny cake 

Someone very cheesy or chipper/nerdy.

He is such a johnny cake!

Johnny cake by Chelle June 18, 2005

Johnny Fingers 

the person who can always intuit when a coworker is stressed out and will magically appear to give a two-minute massage to those in need

Johnny Fingers enjoys giving massages to male and female workers alike as a selfless, altruistic gesture.

Johnny Fingers by Robert Lanham, Author of Food Court Druids, Cherohonkees, and Other Creatures Unique to the Republic August 4, 2004

Johnny's Mom 

A large size female who is ugly and discusting looking and only loves BIG BLACK PRISON SHLONGS!

If your African American then Johnny's Mom is looking for you!

Johnny's Mom by 702Karma666 July 30, 2020

Johnny Blackout

Most typically used as a noun to refer to oneself or others when totally drunk and can't remember a thing.
It can also be used as an adjective to describe onself or others when totally drunk.

"Man, I was totally Johnny Blackout last night. I don't remember a thing. What happened?!"

or...

"Damn, I was Johnny'd last night, fuck!"

Johnny Blackout by JohnnyBlackout January 20, 2009

Johnny Halfcocked 

One who goes off half cocked, and drops stuff in shit. It helps if the person's name is Johnny but not necessary.

Hey!!

Johnny halfcocked just dropped that hacksaw blade in the oil sump.

Johnny Halfcocked by Big Clock August 6, 2009

Johnny_Rockets 

ex #1 op duelist and Minecraft extraordinaire. however due to a incident cause by fellow Minecrafter rexziyw has been falsely banned and is now having to find business elsewhere.

"have you heard of the famous man Johnny_Rockets?" "Yea i heard rexziyw forced him to do something without consent"

Johnny_Rockets by Johnny_Rockets is cool November 18, 2020

Johnny b 

Johnny b is me the person writing this and is 14

Hey look it's Johnny b he's so handsome

I know Johnny b is so good looking and funny

Johnny b by Johnnyn8777 November 25, 2021