To succumb to nervous stress: Whenever they are at the point of stressing out, inevitably one of them will say to the other, ''Want a bugle?''(1990s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with stress out
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.