smart–mouth

smart–mouth /ˈsmɑɚtˌmaʊθ/ adjective
or smart–mouthed /ˈsmɑɚtˌmaʊθt/
smart–mouth
/ˈsmɑɚtˌmaʊθ/
adjective
or smart–mouthed /ˈsmɑɚtˌmaʊθt/
Britannica Dictionary definition of SMART–MOUTH
US, informal + disapproving
: saying rude or disrespectful things

— smart–mouth

noun, plural smart–mouths [count]