BMK slang (yea nigga) that means go to a place. A dip which is a chill place to smoke or hang out, and a cut which is a chill place to do so without being bothered.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.