One who is struggling in school. Not from a lack of knowledge but from a lack of trying all together. This person is just in general a complete artard.
Zach: "Shit I got a flipping 53% on my last test...I hate being a senior already in college."

Cameron: "Your an idiot, your gonna get your acceptance pulled, your such a C-53!!"
by cyosh92 January 27, 2010
Get the C-53 mug.