surefirestop
nounUK /ˈʃʊəfaɪəstɒp/
US /ˈʃʊrfaɪərstɑːp/
A surefirestop is a thing that always makes something stop for sure.
The teacher used a surefirestop to end the noisy game.
OTHER MEANINGS
2. A device that reliably ends a machine's movement.
Press the surefirestop before you clean the machine.
3. A person who always puts an end to trouble.
Grandma is the surefirestop of every family argument.
4. A rule that always stops a bad habit.
The new bedtime rule was a surefirestop for late-night TV.