Slow Up
A variation of the term "slow down", that is guaranteed to fuck with the general population. Means the exact same thing, but is very effective in driving people into a nervous breakdown. Usually paired with "shut up", as; "Shut and slow the fuck up"
Example:
Freddy: "Johnny, Slow up!"
Johnny: "You mean, slow down!"
Freddy: "SHUT AND SLOW THE FUCK UP YOU BUTT PLUG"
Freddy: "Johnny, Slow up!"
Johnny: "You mean, slow down!"
Freddy: "SHUT AND SLOW THE FUCK UP YOU BUTT PLUG"