A horny fifth grader is one whole usually humps their pillow all night, or masturbates to themselves. Usually spends the whole recess talking smack about toher people or Cussing and making out.
Kendall: Man, that Charlie is one Horny 5th Grader for Tucker!
Jess: Yeah, I heard at their sleepover they had sex!
Jess: Yeah, I heard at their sleepover they had sex!
by PixelBlix November 12, 2021
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