run

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Related to run off at the mouth: ran off at the mouth, stick foot in mouth

run

(rŭn),
A group of successive measurements in an analytic process or during a period of time within which the accuracy and precision of the measuring system are expected to be stable.
[ME runnen, fr. A. S. rinnan, fr. O.N. rinna]

run

(rŭn)
1. A group of successive measurements in an analytic process or during a period of time within which the accuracy and precision of the measuring system are expected to be stable.
2. Colloq. discharging mucus nasally.
3. A physical activity or sport (5-mi run).
[ME runnen, fr. A. S. rinnan, fr. O.N. rinna]

run

[AS. rinnan, run]
To exude pus or mucus.
References in periodicals archive ?
So he tolerates their misdemeanours, defends their outbursts and, in the case of Keane, is content for him to run off at the mouth if it means those around him are somehow shocked into contrition.
After all, were Lorelai to be perfectly happy, she probably wouldn't run off at the mouth so much.
While he is a player who can set the SPL alight and destroy just about any defender who tries to stop him with that electric pace it would seem he also hasa tendency to run off at the mouth.