A fork of Rural Dictionary
Revenge or payback. Used as a noun to sound cooler than just saying revenge. Said by Michael and Logan on Zoey 101 when they were trying to get revenge on Vince Blake.
"Vince beat us up last year. We gotta get our cumupins now."
Something that is bad/not cool. It covers much more than just ugly or gross, because it can be used for anything bad.
"Bro, that shirt's flump. Get a new one man."