The act of someone walking in on you masturbating when you're cumming so you have to do the CumCutter and stop.
I was stroking it last night and my sister walked in so I had to pull the good ol' CumCutter. Needless to say, I can never look at my sister the same again.
Slang for a Puerto Rican. Used because they often go for the $2 box cutter rather than a more expensive butterfly or switchblade. I was told this by a Puerto Rican himself, so I assume its legit.