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1.
When shenanigans just aren't enough and you completely have gone beyond the definition of shenanigans and absolutely regret what you have done.
"OMG last night was SO crazy. I got into major shenanigans! I completely regret everything I did. I made out with (insert regretted name here) and came home soaking wet!"
"Dude...those aren't shenanigans...Those are regretigans!"
by Raewow's Biggest Fan October 20, 2011