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*
Same as hoe, only incode so it can be said in school. Turn the numbers upside down to see. Usually said by children in elementary and middle school.
"I know, she's such a 403."