cook off

cook off (third-person singular simple present cooks off, present participle cooking off, simple past and past participle cooked off)

1. (transitive, US, military) To pull the pin from a grenade and wait two or three seconds before throwing.
2. (transitive, US, military) As with above, except to unintentionally wait so long that the grenade detonates.
3. (transitive, chemistry, military) To cause an accidental detonation of explosives, especially due to excess heat.
4. (intransitive, chemistry, military) To accidentally detonate, especially as the result of excess heat.