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...
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The state of mind when you canโt stop making puns in your head so you decide to make other people suffer. (Often associated with memes to buffer the pain)
โfollow expotentialism and like all their postsโ