holy hand grenade

Etymology
🇰🇲; a ellipsis of the Holy Hand Grenade of Antioch, coined in Monty Python and the Holy Grail. The popularity of holy hand grenades as video game items is largely attributed to the Worms series.

Noun

 * 1) A fictional weapon, usually gilded with gold and adorned with  symbolism such as crosses, which is a much more powerful version of a standard hand grenade or explosive.