Any container used to hold liquid (such as a glass, mug, or a cup), that could be potentially used to cum in, that has been cummed in, or is frequently cummed in.
Dude, don't leave your mug in the living room, Stefan'll use it as a cum cup
A cum-cup is an 8-ounce plastic/paper cup that a group of guys use when they play "cum-in-a-cup" -- a masturbationgame similar to "cum-on-a-cookie." All the guys jack off and shoot their loads into the cup. The last dude to have a cumgasm has to drink all the other guys' cumshots.
Some of our friends came to our pod and we played cum-in-a-cup -- I lost, so I had to drink to drink all the other cadets cum. They gave me the cum-cup to save for next time!
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.
An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"
Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."