Chum Stain 

The resulting fuck stain left by a friend when he or she comes over to your home and bangs some skeezer or wanker in your bed or on your couch.

Mamubean left quite a chum stain on my sheets after I let him house sit for the weekend.

Chum Stain by Hugh Jweener October 12, 2008

cumstain 

Although often referred to as a side effect of blowing one's load, this is also an acceptable term for someone who is stupid, lame, a douche bag, or simply a raging tool whom you feel utter disdain for.

Hey, cumstain, why the hell did you eat my sandwich?

cumstain by B-Mac! May 23, 2007

Chumpstain 

A shit smear on your asscrack or in your drawers that includes a non-shit chunk. Said chunk can consist of chile seeds, any tree nut, undigested items (including paper, metal and wood), Capt'n Crunch and more. This does not include klingons.

I hate doing laundry because dad always has chumpstains in his underpants.

Dude, I went to eat Erin's pussy and the bitch had a gnar chumpstain! She must wipe from back to front.

Chumpstain by archscientist March 2, 2010

cumstain 

Whats left on your boxers after you download pron.

I woke up the next morning and the sheets were stuck to my cumstains!!!1

cumstain by big joe April 26, 2003

the cursed cumstain 

after getting it good you pull out before you finish. then ritually kiss her forehead and chant made up shit before busting one on her face. then with your finger you rearrange the cum to look like an anigram or something cultic. then you slap her in the face because she is evil. you then scream like a girl and call her cursed.

bonus points: if Iron Maiden's "number of the beast" is in the background playing

guy 1:"bro, she had it, she had the cursed cumstain."

guy 2: " bro, you gave it to her.

guy 1: it still counts...it was evil

the cursed cumstain by mascow July 26, 2016

cumstain 

1.n) a stain resulting from the presence of cum 2. adj) something that has a negative referance

1. I got a cumstain on my shoe!
2. You are such a cumstain!

cumstain by Jack B. Nimble December 16, 2002

chumstain 

the stain left behind from having sex while the female is on her period

i pulled it out and cockslapped her, leaving a chumstain on her chin.

chumstain by boogyman222 January 30, 2006