A person who is so thoroughly stressed out that they have just let themselves go.

Often looks crazy, tired, frumpy, and on edge for seemingly no reason. May also be prone to fits of crying and curling up in a ball.
Don't try talking to Jessica. She's been studying for finals all week and is a total stress mess.
by Peter W.N. October 13, 2010
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Having feelings for an ex-gf/bf who wasn't worth it
Chris: Joseph just broke up with his girl and hasn't eaten in days, I don't

want him to stress over a mess
by KeviNasty August 8, 2016
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