"Cleaning This Gun (Come On in Boy)" is a song written by Casey Beathard and Marla Cannon-Goodman, and recorded by American country music artist Rodney Atkins.

The song became Atkins' fourth consecutive number one hit on the Billboard Hot Country Songs chart, tying a record for most number ones from a country album since Tim McGraw's Set This Circus Down in 2001–2002.

In the first verse, he admits that while he doesn't remember much from what he learned in high school, one thing he does remember is the speech given to him by his girlfriend's father after meeting him for the first time—a speech meant to instill fear in the boy so that he doesn't misbehave when he's with the girl, ending with "I'll see you when you get back / Bet I'll be up all night still cleanin' this gun."

In a short bridge later in the song, the narrator admits that the approach is merely to intimidate the young suitor, but that it's extremely effective ("It's all for show, ain't nobody gonna get hurt / It's just a Daddy thing, but hey, believe me: man, it works").

The song concludes with the narrator speaking to the boyfriend with "Yeah, son, y'all buckle up and have her back by 10, uh, let's say about 9:30.