Slang for a girl who has such a huge ass that you can't get around it.
--Damn, that girl's ass is so huge it's a wagon.

--No, man. That ass is a semi-truck.
by phoenixarising January 21, 2010
Get a semi-truck mug for your guy Jerry.
The act of inserting your penis into a female's mouth with such an immense amount of force that it penetrates her lips and breaches the throat. It is common that the female participating in this act in unconscious and is killed in the process.
Friend #1: "Hey bro, did you hear what I did over the weekend?"
Friend #2: "No bro, what happened?"
Friend #1: "I pulled a Kentucky semi truck on her at a party!"
Friend #2: "Damn, you're lucky!"
Friend #1: "Yea, I'm going to jail because I actually killed her but it was totally worth it!"
Friend #2: "K m8"
by MurrDurrrYT March 09, 2016
Get a kentucky semi truck mug for your father-in-law Bob.
The Semi Truck is when you nailing a girl from behind ( the floor works best)
and you reach undr like your gonna grab her tits but instead you throw your arms out andit hers causeing her heard to slam on to the floor and then you slam her adn hard as possible adn she will it her head on the floor several times before she can get back on her hands
i felt like driving the semi truck today so i drove my chicks head into the floor
by kgyuyu March 04, 2009
Get a the semi truck mug for your daughter Riley.
The two friends in a group with two couples.
Roberta and Bob are dating and Jessica and Daniel are too. James and I were friends. We were semi-trucking.
by StormStars April 29, 2018
Get a Semi-Trucking mug for your Facebook friend Günter.