Similar to "on my mama" or "on bro" the slang phrase "on guys" is a term used to ensure others that the user of the term is not lying
On guy's I beat dat nigga ass dawg
If dis nigga say one more thing bout my mama I'm shootin his house up on guy's
Pcc jiggy is da hottest youngin out Portland nigga on guy's
Dat nigga wanna box but he know I'ma thump fr
Back up for I gotta thump yo bitch ass