The transmission on a semi truck has more gears than a car and a lower top speed; the low gear is around 2 MPH and the highest may be 64 MPH on one of the 16 speeds. If the driver is going down a hill sometimes they can drive over the top speed of the transmission by shifting to neutral and letting gravity do the work, which is called Kentucky Overdrive.
by Craigslist Mick November 4, 2023

When a person shoves their thumb down their partner's/own vagina when said partner/person is on their period. The 'Kentucky Plug' also applies to men who eat Chipotle or Taco Bell on a daily basis. The Kentucky Plug is not used for sexual enjoyment but for a tactical advantage over your enemy.
I watched Kentucky Ballistics stick his thumb down his jugular to stop the bleeding so I pulled a Kentucky Plug on my explosive asshole!
by Supreme Kids are Gay May 20, 2021

by Master Chief 88 August 9, 2018

by McNuggetstorm November 25, 2023

Kentucky Plug. When you have a hole in something and you absolutely need to plug it very fast! What type of hole I'm not saying, you can use your imagination. But a you Kentucky Ballistics used his thumb to save his life from a 50 BMG SLAP round.
by ERDude May 20, 2021

When you dive to the the bottom of a body of water, flip upside down, and blow a load toward the surface.
by lifeafterlove August 20, 2022

The precise art of putting your thumb in a hole as to prevent the rapid exit of bodily fluid, as shown by Scott from Kentucky Ballistics
The misses was about to squirt but i couldn’t have that over my shirt, so i gave her the Kentucky plug
by Whohancutman May 20, 2021
