1. A very attractive woman. So named because her attractiveness is so stunning that it can (figuratively) knock you out. (make you speechless, stutter, etc.) Hence the term "knockout."
2. A punch in boxing that knocks your opponent unconscious, typically ending the match.
Guy1: Wow check her out!
Guy2: Yep, she's a knockout all right.

โดย GMG1 02 มกราคม 2008
to go to sleep. mainly said in reference to a full nights rest, 7 or more hours.
hey man, i'm about to knock out. laters.
โดย noooooooooope 07 มิถุนายน 2009
(Informal Noun) a person or thing that is overwhelmingly attractive.
Svetlana knew how to dress to perfectly complement her tall, athletic frame. By virtue of her bright eyes, silky long hair, and a smile that could stop a revolution, people widely regard her as a knock out.
โดย JigHexadecimal 26 สิงหาคม 2007
This is a girl who is beautiful with or without makeup. Most are high matinence but doesn't mean all of them will be. She has it all, beauty and brains.

Also know as: Knockout Beauty.
I like dat chick right there! She's a knockout.
โดย Mon-Mon 13 สิงหาคม 2007
a basketball game where one person shoots a free throw/three pointer and if he misses he must chase his ball and make any shot before the person behind him makes a shot.
I can't shoot so he beat me in knockout.
โดย ben renner 22 มิถุนายน 2005
To go to sleep.
I'm so tired so I'm gonna knock out!
โดย Blabbermouth 23 มิถุนายน 2014
Knockouts and Knockouts Haircuts for Men are the trade names of an American salon chain with a boxing (and mixed martial arts) /sex appeal theme targeting men. NBC's "The Today Show" and CNBC's "The Big Idea with Donny Deutsch" and other media have labeled Knockouts the Hooters of Haircutting. Knockouts employs an attractive all-female staff of licensed hair stylists and massage therapists. The services include haircuts, hair coloring, waxing, manicures, pedicures, and six types of massage therapy.
Dude, if you want a cool haircut and a FREE beer, go to Knockouts, they are the Hooters of Haircutting.
โดย El Jefe Viernes 20 พฤษภาคม 2009

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