A challenge between two or more cumdumpsters in an attempt to become the ultimateejaculatory fluid swallowing and bathing slut. These competitions can last days, maybe even weeks.
"Sasha was victorious in the last cumathlon after receiving over 9000 facials and swallowing around 20 gallons of sperm."
Someone who is such a cunt that the word means nothing to them this word however is much more powerful and will obliterate anyone the word is used against