When you start making a good beat so that someone can listen or rap to it. If y'all are just chillin' or whatever you can use a pen or pencil or whatever and start beating on a desk or whatever.
*note* Teachers are very annoyed with this, even if your beat is tight.
Guy: Drop da beat, dawg Gal: *uses pencil and makes a rythm on her desk*
To drop ones pants and masturbate profusely as in making music. In certain atmospheres it is popular to masturbate to the music of the pornography therefore dropping a beat. A.K.A Jacking Off, Masturbating, Choking the Chicken, Spanking the Monkey
Bob: Yo dude I heard this weird smacking noise in your room.
Jim: Yeah dude I was droppin a beat.
Bob: Gross you better not have gotten some milk juice on my keyboard
To masturbate so wantonly and so violently that one produces only a single bead of ejaculate that simply falls to the floor. Occurs with Duke students studying abroad that are having difficulty tapping dimes with tig ol bitties.
Dude 1: Dude 2, I almost got domed by this italian midget last night.
Dude 2: Damn man, that's cool... so do you wanna circle jerk now?
Dude 1: Yeah, just let me finish my kabob, my delicious delicious kabob.
"Scott was sleeping with his shoes on last night, so I dropped a beat in his mouth. Dropping a beat is awesome."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"