When your buttocks are clinched so tight that your fart escapes at the top of your ass crack causing a ticklish sensation.
My pants were so tight while I was sitting down in class that I experienced a Top Pop.
Some ghetto 50 to 75 cent drink that is artificially colored and flavored...tastes like bootleg welches, koolaid, and sunkist
Lets get some top pop at the bodega!
Man, I can't afford sprite...damn, i have to get top pop