Top Definition
Exomnia is a disorder caused by excessive concern for one's ex girlfriend/boyfriend. Characterized by persistent difficulty falling asleep and/or difficulty staying asleep. Associated with impairments of daytime functioning or marked distress for more than 1 month.
Man, I hardly get sleep these days.

Still can't get over your silly ex gf? Dude that's exomnia.
by StillNotJoshie June 25, 2010
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