Top Definition
cumderwear is the nickname for old, dirty underwear. the name was established due to the fact that many people liked to jack off into old pairs, as it was easy to clean up the cum. but cumderewear is not just a word that describes using underwear for masturbation. it can refer to a ripped pair, a worn out pair, or a pair that was stained by a peeing/pooping accident.
whenever i'm looking at porn on the computer, i put on a pair of old cumderwear and jack away.

i had to throw away that old pair of cumderwear after the hole got too big.
by Scott Doesn't Know June 25, 2006
n. normal underwear which for any reason is soaked with semen or vaginal fluids.
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.
1. "Jimmy I swear to God, I'm your mother not a landromat. I will not touch your disgusting cumderwear anymore."
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.
by Nick Micheletti October 09, 2006
A woman's underwear that, after sex without a condom, begins to fill with semen that was not fully drained out when she went to the bathroom immediately following coitus.
Man: "That was some great sex."
Woman: "BRB, gotta empty out."
5 minutes and woman go out to get some coffee...
Woman: "It is still dripping! Now I have cumderwear! Ugh"
Man: <laughs>
by SteveW123 April 30, 2010
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