1) Shortened form of biceps. Commonly used by gym-goers.

2) Short for "bisexuals."
Rocky: "Oh man, my muscles are killing me! Check out the gun show! (flexes arms) I did bis and back at the gym, and I hit it hard!"
Jeff: "Reminds me of your mom and sister last night."
Rocky: "What?"
Jeff: "I hit those bis from the back REAL hard, bitch!"
Rocky: "Awwww sniggity snizzap."
by Nick D August 16, 2005
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Person 1: “I’m straight.”
Person 2: “I’m bi.”
by LGBTBoi August 13, 2018
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bi is a shortened name for bisexual, bisexual is a sexual orientation when a person feels sexual desires with both genders.

BUT, if a bisexual women (for example)had a relationship with a female they are not a lesbian, they are bisexual, if they have a relationship with a person of the opposite sex, they are still bisexual non the less.

bisexuals are not ‘unfaithful’, bisexuals are not confused.
“did you find out that Jess came out as bi? good for her.”
by Langfordrussell November 8, 2019
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Short for Bisexual, meaning being sexually and/or romantically attracted to males and females.
by Danylko September 20, 2004
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A term that is formally used to address a person, both male and female, that has familar to the term "bitch". It is used normally with a shreiking tone.
Yo, stop stepping on my shoes, BIS!!!!!!!!
by Duckie Dao December 24, 2008
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A Kr0ean who says he is not a whale.
"Hey whale!" "I'm not a whale!"
by Drunk June 15, 2004
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Silent wording for bitch when trying to not say it out loud.
"Right! Hehehe... (bis)"
by Thaddian July 13, 2015
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