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A person who separates a a family member from his/ her partner and keeps that person at home. Also bans that person from riding, going shopping, etc. Also a person that wants to keep the person home because he / she might start drama.
Her sister is a isolationist, she keeps me from going out to eat with the girl I love.
by gccradio2015 February 02, 2020
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Jul 29 Word of the Day
Someone who used to be a potential girlfriend/boyfriend, but no longer is.
Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...
by brownsuite September 24, 2011
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