A euphemism often used by Negro Americans, typically a command insinuating that if the individual in question does not desist with their current forward mannerisms they will incur a so called "bitch slapping," a most unpleasant experience.
Don't trip or I'llmoonwalk up all up and down yo ass.
A saying for not letting the past affect you and moving on to better yourself.
Derek: "I still can't believe I sold our homecoming game, bruh."
Uriah: "Don't trip over what's behind you, we still have the rest of the season to lock in."