Eighteen wheeler 

Southern slang for a tractor-trailer truck. Also called a semi-truck

That eighteen wheeler was doing at least 90 down the interstate

Eighteen wheeler by Russellsroughneck October 1, 2021

Eighteen wheeler 

Similar to Poophole loophole(doing anal to avoid losing V card).
The act of putting two fingers in the pussy, and blowing a full load in the rear. Called the eighteen wheeler cause two in the front and full load in the rear.

Girlfriend is afraid of getting pregnant so i gave her the eighteen wheeler.

Eighteen wheeler by Electron101 September 4, 2016

Eighteen wheeler 

Rhyming slang for "dealer"

Blew all me bugs with me eighteen wheeler this pay. Flat stinkin brassic mate!

Eighteen wheeler by Faaarkenell March 29, 2023