A fork of Rural Dictionary
1. A complete idiot (Like Tom Cruise)
2. A complete idiot who jumps on couches (Like Tom Cruise)
Dammit I hate that kid, he's such a couch jumper!!
Simply means, shitty undies (like when you shit yourself (literally) and you get all shit in your undies.)
Dude, after I went on that rollercoaster...I GOT SHUNDIES!