gag
muzzle
mic-check
bite one's lip
bite one's tongue
la la la
gaggee
filter
jump in
mind one's language
impulsive speech
blah blah blah
shushing
silence
break in
sticks and stones may break my bones, but words will never hurt me
put a sock in it
umlessness
pardon my French
antispeech
er
eat the mic
contradiction
don't get someone started
white noise
endophasia
watch one's language
wait
harangue
cramp someone's style
oration
whillywha
wooden language
talk to the hand
cut off
antiverbal
yabble
keep mum
antigag
interpose
speech fright
deplatform
make silent
slide
save one's breath to cool one's porridge
paralipsis
buttonholing
get off of someone's cloud
spoken pause
keep one's mouth shut