Meaning: close your mouth or be quiet
Rewrite 1: snapiv9 your flapn2
Rewrite 2: close your pie hole
Rewrite 3: lock it shut
Rewrite 4: plug your escape hatch
Comment: All of these rewrites would work if you put them in the right context, but they could also be taken as a double entendre if you aren’t careful.
More reading about clichés
What I found when I googled “clichés”
• Clichés to say in times of trouble is what The Book of Clichés is all about.