Short for cisgender. Someone whose gender is the same as the gender they were assigned at birth. Not transgender.
Derek is male and he was assigned male at birth, so he is cis. Tracy was assigned male at birth but she is female, she is not cis.
by JosephineAda January 18, 2017
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(1) Citizenship and Immigration Services; the successor to the investigations and processing arm of the former Immigration and Naturalization Services (INS) of the USA. In 2003, the INS was dissolved and its enforcement arm transferred to the new Immigration and Customs Enforcement (ICE). The INS had formerly been part of the Justice Department; the CIS is part of the Department of Homeland Security (DHS).

(2) Center for Immigration Studies, a thinktank founded by John Tanton as a project of FAIR. The Southern Poverty Law Center (SPLC) lists the CIS as a racist nativist organization with extensive connections with other rightwing organizations.
(DEF1) She spent the better part of a week struggling through the CIS website, trying to imagine how anyone could get a work permit without violating the laws of physics.

(DEF2) Some at CIS have also written for a nativist hate site, VDARE.com, which is named after Virginia Dare, said to be the first English child born in the New World. They include CIS Fellow John Miano and board member Carol Iannone.
(Heidi Beirich, "CIS: The 'Independent' Think Tank," Feb 2009)
by Primus Intra Pares June 16, 2010
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A made up stupid tranny term used by the gender switch folks community to describe normal people that are not confused about their pronouns/gender identity. It's especially very insulting, since it's NOT us that are changing and mutilating our genitals to adapt to them...they ARE the ones changing and transforming to adapt to US.
These hypocrites want others to respect their pronouns..yet they don't wanna respect our pronouns. They wanna be called "women" but wanna call real women "cis" and get offended if we used the term "real" cause it would be "TRaNspHopiC"
I'm not a "cis" woman..I'm a woman.
I don't need a prefix to describe who NATURALLY I am....a woman.
by Freakphobe January 17, 2021
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A slur used to group anyone together whose gender and biology match up. Mainly used by transsexuals who boost their own ego by belittling or being racist/sexist to others.

It's often been used as an insult by the aforementioned people.
M: "Why can't you just have one opinion instead of changing it to fit your narrative?"
F: "Yea, like, just be normal."
T: "Y-you... You racist, fascist, cis, heteronormative, sexist crackers!
by The 🍓 December 31, 2020
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someone who is not transgender. someone who agrees with the gender they were assigned at birth. not a slur or derogatory word, just a word with a non-offensive definition.
since I was born male and still am a male and do not have plans or wishes to transition, i am cisgender.

oh, not you an ultra libtard dipshit now huh.

no, I literally just think it's an accurate description of my gender identity. fucking get over yourself. not everyone wants to demean you because you exist. also, i would like not to be called a dipshit for using words with definitions please.
by Apparently an sjw October 28, 2017
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CIS - Noun, Abbreviation
Communist Independent States. The states that were under Soviet Communism control but were not officially part of the Soviet Union.
Kazakhstan, Hungary, and North Korea were Communist Independent States. (CIS)
by Killa Klown April 20, 2006
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