Betraying your partner, disrespecting their trust. Being disloyal and not being honest. Cheating.
Kean was unfaithful, he was flirting with other girls behind mya's back
by RoastingNiggas September 20, 2015
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1. Not true to one's sexual partner.
2. One of Rihanna's song.
"Im not being unfaithful to my boyfriend!"
by ThisAsianGirl May 2, 2006
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When a he or she is obviously sleeping around behind their significant others back.
Normal guy: Hey who were you talking to on the phone?
Khaled: Oh, just my girlfriend. We met on vacation.
Normal guy: Bro, I thought you were married.
Khaled: I am but whatever bro .

Normal guy: Bro, that's unfaithful
by Itsmemartyo January 10, 2019
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Something built into mens genes and expressed thru removal of jeans.
Unfaithfulness is like gravity. Always tugging away.
by fun2try2 June 29, 2009
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When your significant other cheats by promising to do all the choirs after they get their way first,
My wife is an unfaithful cleaner always promising to straighten the house right after dinner or a movie etc.
by PSC pimpn November 7, 2013
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Originates from downbad. When there are so many girls that follow you, but you can't choose one. So you go around dating each one to not let any of them down.
I am jealous of Kevin because Kevin do be down unfaithful. He gets the shorties all the time.
by AnonyPersony August 19, 2021
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