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Just below Fuckbag on the Joker-San Female Rating System, a Cum Tanker describes the infamous fukanythinwithacockian slut. Usually a higher form of party girl who gives blow jobs in the bathroom of the local night club instead of a back alley next to a dumpster, like a Drink Tickets or a Gas Money would. Her being a pro, she can most likely take it all the way down to the base without gagging, and "tanks" every last drop like its fuel for her internal party engine.
"I met this chick at the club last night. Whoa boy, she was a total Cum Tanker. She gave me an amazing suckbuggy in the bathroom and made every inch disappear. Fantastico!"
by SP00NS September 24, 2007
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