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Related to turn tail: stick with, run by, let off
turn tail (and run)
Fig. to flee; to run away in fright. I couldn't just turn tail and run, but I wasn't going to fight that monster, either. Sometimes turning tail is the only sensible thing to do.
1. to suddenly leave The only thing I could do was to turn tail and run from my attacker.
2. to suddenly change from supporting something to opposing it The senator turned tail on his party.
to run away, usually because you are frightened When I saw him my first impulse was to turn tail and flee.
Run away, as in When they heard the sirens, the boys turned tail. This term alludes to an animal's turning its back in flight. [Mid-1500s]