Hold (one's) tongue old-fashioned phrase informal
To stop oneself from speaking or saying something, especially when one wants to do so.
I sat through that whole silly meeting holding my tongue.
If you want to stay alive out of here, you better hold your tongue.
I felt like telling her that she looked silly, but I held my tongue.
A: I'm sure it'll rain during their wedding. B: Hold your tongue!
The verb "bite" must be conjugated according to its tense.
Chaucer used the first idiom in The Tale of Melibus (c. 1387): "Thee is better hold thy tongue still, than for to speak." [First half of 1300s]
If you take a flyer (on something), you take a chance, risk, or gamble on it.
The coach took a flyer on the young goalkeeper, and it turned out to be a wise choice.