This phrase is an odd variation from the regularly used phrase "that sucks". There are two main definitions of this:

1) in literal terms, putting your mouth to an anus and quickly inhaling, causing a stream of air to be pulled into your mouth from the anus.

2) in slang terms, to be bad. This is how the phrase is most commonly used, and tends to be more intense than the usual "that sucks." "That sucks ass" is like adding a "really" to it.
"She sucks ass!"
"Wait, seriously?"
"Not like that, man"
"Oh..."
by Dirty Shoes January 12, 2005
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of such inferior quality as to boggle the mind
This is an aweome song! It's too bad the station sucks ass to the max!
by MM from BB November 11, 2003
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A sycophant.

Someone who thinks if they kiss the right ass, it will get them somewhere.

A yes man.

Someone who sits in the supervisers kissing ass in the office everyday trying to get a salaried job.
by jehosifat July 19, 2005
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something is really bad it may even cause consequences
" I got a D in french class...it sucks ass.."
by cass c January 27, 2005
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1. Someone who sucks up to others he/she deems superior.
2. One who worships celebrities or big name athletes.
3. Most sports journalists.
4. Jay Leno.
1. "All those douchebags at ESPN do nothing but suck ass."

2. "This Jay Leno guy, he does nothing but suck ass every night on his show."
by Hammerstrike June 10, 2005
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