BOOGIE DOWN: The last (DOWN-most) word of each vertical theme answer is a type of dance: VOGUE, SALSA, and TAP. I hope you have your dancing shoes on, because it's time to BOOGIE DOWN. I had a ...

I was not surprised to discover it's a sports term. Add this to the sports knowledge I've gained from crosswords! In pick-up basketball, "BALL UP TOP" is a phrase used to keep the game moving.