heads will roll 

people will be dismissed, punished, ruined, etc

If any of you violate the dress code again, heads will roll.

heads will roll by Light Joker November 20, 2005

heads will roll 

used to tell what would happen in a really bad situation

If my parents find out about the F on my math test, heads will roll
------------------------------------
Keep your hands off my girl or heads will roll

heads will roll by dboyfromdahood June 15, 2012

heads will roll 

heads will roll is a way to threaten someone

A: If you touch my girlfriend again, heads will roll. Got it?
B: Alright man, I'll lay off.

heads will roll by ratatouillelover November 7, 2022