Groundskeeper Willie 

Scottish janitor/groundskeeper of Springfield Elementary School, with with thick accent and bushy eyebrows. Famous for tearing his shirt exposing ripped, muscular torso. Lives in a shack on the school grounds, drives a tractor, often insults people he is gpeaking to.

Groundskeeper Willie: Have you got wax in your beester? I cannot fit into that wee vent, you croquet playing mint muncher.
Principal Skinner: Grease yourself up and get in there you... gruff speaking work slacker.
Groundskeeper Willie: Ooooh, good comeback.

Groundskeeper Willie by A.Warm July 1, 2006

Groundskeeper 

The act of peeing inside of a butthole.

I'd stay away from Lewis, he's a total groundskeeper. I mean, unless that's your thing.

Groundskeeper by Mycatlego September 7, 2013

Ground Speed Check 

To humble an arrogant person; To knock someone down a peg; To overshadow another person, particularly someone who is arrogant or someone who has upstaged someone else.

Derived from the semi famous SR-71 groundspeed check story.

Person 1: I just finished another great medium article. Pretty good if I do say so myself.

Person 2: Boy my op ed was just published in The New York Times.

Person 3: Now that's what I call a ground speed check.

Ground Speed Check by Legnut March 23, 2017

Groundskeeper 

Those who really know how to trim a bush. They are very skilled at planting their seed deep. When it comes to getting down and dirty, you just can't beat a groundskeeper.

That groundskeeper sure shook my tree last night.

Groundskeeper by Dirt Devil November 9, 2019