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1. Someone who is addicted to sex, meaning they physically and mentally cannot go a certain amount of time without it. Usually results in having sex with someone they normally wouldn't, simply because they need a fix. Similiar to alcohol and drug addiction because in all three, a person is craving a release from stress and/or some form of gratification.

2. A lame reason people give for cheating on their significant other.
1. "I can't believe I had sex with HIM last night...he has every STD known to man, and a few known only to dogs. I felt the need to jump SOMEONE, and he happened to be right there. I hate being a sex addict."

2. " wasn't my fault I slept with your sister...I'm a sex addict...I can't help it.."
by Kenari Marks June 27, 2006
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A sex addict is simply one who is addicted to further explanation needed...
Naseem: Im a SEX ADDICT!
Doctor: Yes, yes you are. You need to go get some of that sex..
by LAla7676 February 25, 2009
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someone who cannot live without sex for a long period of time; it's such a deep desire that they would have sex with anyone just to fulfill that constant desire.
also, commonly known among teenagers as "a krystal".
Example; "I was wrong for cheating on you. I was pulling a krystal, and i'm sorry".

-my exgirlfriend krystal is such a sex addict. i swere, she used to try and pressure me into threesomes with her and some random person. it was just plain sick.

-You can't live without sex for a day! your such a damn sex addict! i can't believe you.
sex addict, sexaddicked
by Hollie Kelly May 13, 2007
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A person with a love for sex often stronger than their love for family. They are constantly looking for their next chance to get laid like other addicts looks for their next chance to get what they want. Often if going through withdrawals mood swings or irritability will happen. If someone you know is a sex addict often they will become desperate to sleep with whoever they can. make sure you keep a close eye on them because they will do anything and everything in their power to have sex. DO NOT ENCOURAGE THEM! Avoid any things that revolve around sex or sexual ideas. This could trigger them to become more desperate.
God she is such a sex addict she slept with Randy. That boy has more STDs than I could count.
by Nikki sixx March 05, 2014
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