Ab is a short name for Abby.
"Hey ab would you please go get something from the stock room"
by Logan Security January 28, 2022
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To masturbate behind a woman without her knowing and ejaculate on her back.
...according to her Complaint, Brown “began masturbating near her without her knowledge and ejaculated on her back,” Antonio Brown, gave her the AB
by BigBadBootyDad September 17, 2019
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analogous blacks;

a colour scheme used in 17th century art when first developing the colour wheel
During the gentrification of the proletariat, Sam moaned acrimoniously that his use of 'ab' was poor.

j.k: if you believe this definition, you're a gullible idiot
by HeathLedger's Third Drug July 21, 2018
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A typical ending of a story, told by your Thai friend
...he asked me for a cigarrette. I sad to him:"Fatz ab".
by DELTAGOD February 17, 2017
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