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.
Abbreviation that means "Exhaling Out My Nose". This is often the reaction to a funny text, tweet, video, etc. that causes you to abruptly exhale out of your nose, but not quite fully laugh out loud.
"Damn dude, check out this video, it's pretty funny"