run at the mouth

Talk too much

To run at the mouth is to talk excessively or indiscreetly, often without saying anything worthwhile: He just runs at the mouth—never shuts up.

The phrase suggests someone who can't control their speech, letting words spill out carelessly.

Sometimes implies revealing things better left unsaid.

Related

prattle · go on and on · garrulous · yap · verbosity · bend someone's ear · blather · ramble · chatter · indiscreet · rant · spill the beans · loquacious · distracting · annoying · jabber · shoot the breeze · loose lips

Opposites
verbal output quantity

run at the mouthtaciturn

Habitually uncommunicative

silent · quiet · mute · reticent · tight-lipped

verbal discretion

run at the mouthtight-lipped

Unwilling to divulge

discreet · keep mum · keep one's counsel · close-mouthed · zip one's lip

Family

running, runner, runners, overrun, outrun, mouth, mouths, mouthed, mouthing

Familiarity
Top 200,000
Profile
Used worldwide · Timeless · Negative · Everyday, not technical · Rated G