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 ?
Michael Bell is never one to run off at the mouth regarding his own horses, so when he reckons Redford is Group class, you'd have to think he looks well in today in the Bunbury Cup.
Gee, Maureen, is it tough for you to actually get off your duff and check your facts before you start to run off at the mouth? Oh, I forgot - pseudo-intellectuals and effete snobs who are anointed with the title columnist feel they have the right to write whatever they want and pass it off as the truth.
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.