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Related to stress out: Stress management
Subject to or undergo extreme pressure or strain, as from working. For example, I badly need a vacation; I'm just plain stressed out from this job and its aggravations. The verb stress has meant "afflict with hardship" or "distress" since the 16th century, but the phrase stress out, alluding to psychological stress, dates only from the 1940s.
1. To subject something to extreme stress, as from working too much: The tight deadlines are stressing out everybody in the office. I might not be cut out for this job; the demanding schedule stresses me out. Don't stress yourself out trying to finish the project; I'll take care of it.
2. To undergo extreme stress, as from working too much: You're always stressing out about things that can't be changed.