recherchez un mot, comme wyd :
 
1.
cum or vaginal discharge on your underpants due to general horniness and presense of an active teenage vagina.
"Hmmm, should I wear Olivia's Bratz underpants or my cumderpants?"

"Your cumderpants. You don't want uneven flap disease."
de i love bj 24 mars 2010
 
2.
A soiling of the underpants resulting from a wet dream or accident during a lap dance. Common amongst teenage boys.
Bob had a wet dream so his mom had to wash his cumderpants.
de Schillbj 20 avril 2009