1. underwear which a young male may realease his fluids into while masturbating in bed.
2. underwear which men without condoms splooge into rather than partner's vagina or face (or male partner's anus, but why not?).
3. panties which females get all moist and sloppy when horny or dry rubbed.
4. (slang) referring to any person particularly emasculated.
v. to cream your jeans.
2. "Baby I don't have any cumderwear, I'm just gonna go on your back."
3. "I was watching George Clooney with a miniskirt on yesterday and I totally turned the living room sofa into cumderwear."
4. "We destroyed that other team in sports. We turned them into our cumderwear."
v. Jimmy was so excited when his voluptuous teacher bent over that he cumderweared.
i had to throw away that old pair of cumderwear after the hole got too big.
Woman: "BRB, gotta empty out."
5 minutes later.....man and woman go out to get some coffee...
Woman: "It is still dripping! Now I have cumderwear! Ugh"