A combination of scratch and punish usually used to replace the word punish. It implies that some sort of kinky deed must be done to the offender or to self. Best said using a sweetish school boy's accent.
Oops! I did not mean to touch your butt, looks like I need to be scrunished.
A most excellent word used to articulate the feeling one is overcome with when they complete urination after a long period of "holding it" in which the bladder was very strained causing severe discomfort.
"Man, I've had to pee since 1st period," (it's after school now) "and now I feel scrumdiggity!"