when you suddenly go from very happy to very sad, whether it be from something that happened (breakup, striking out, cockblocked) or coming back from a manic episode.
(Guy A) Dude, I was really doing well until I said something wrong. Now she won't talk to me.
(Guy B) Wow, emotional faceplant.
(Guy B) Wow, emotional faceplant.
by impslayer July 25, 2010
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