
Run (someone's) mouth

Translation of "run (someone's) mouth" into Russian
run (someone's) mouth
He tends to run his mouth without considering the consequences.
Он склонен болтать лишнего, не учитывая последствия.
Definitions
To talk excessively, often in a boastful, rude, or reckless manner, especially by saying things that are better left unsaid or by speaking without thinking.