He was running his mouth, wasn’t he!!!!!!! — The epitaph of any dead snitch that thought that the witness protection program would keep him safe.
A member of the community standing over a bullet riddled body with a rat in each hand and one shoved in its mouth:

“ He was running his mouth, wasn’t he!!!!!!!”
by Mind Hunter the Profiler March 9, 2023
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running off with the mouth one who runs their mouth don't know when to shut up and makes inappropriate comments constantly
always running off with the mouth my ex-girlfriend don't know when to shut up and she makes inappropriate comments constantly
by littlejimmie December 6, 2019
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someone who speaks without the neccessary brain functions required proir to speaking
The fundimentalists are running off at the mouth again with their dribble dick hatered
by earthlover42 June 29, 2005
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