bite my tongue 

keep in silence, keep a screet

I know what's going wrong with him, but I'll bite my tongue

bite my tongue by PenpenGang June 7, 2020

Bite my Tongue at You 

Holding back whatever the individual wanted to say (insult) by biting their tongue.

Form of holding back and insulting someone without actually saying the insult intended.
Often used because the insult is too hard-hitting to be used.

"I bite my tongue at you sir."

Bite my Tongue at You by Mehaljebro April 22, 2019

bite my tongue off 

enjoy a meal.

I'd bite my tongue off if I could.

bite my tongue off by Philosophical-Cat November 2, 2017