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Anything that even remotely involves shittiness. It can be anything from an experience to a person. Anything that sucks, can suck, and will suck on an epic level.
This definition is the suck of life.

Hannah Montana concerts are the suck of life, even if Miley Cyrus is hot.

Those mashed potatoes are the suck of life.
by Voldemuffin August 02, 2008