to explode, burst, blow up · to detonate (combust or decompose supersonically via shock compression) · to blow one's top, go ape, go apeshit, hit the roof, hit the ceiling, lose one's rag (to become explosively angry)
çekim: geçmiş räjähtänyt · şimdiki räjähtäisi · ulaç räjähtävä
köken: Fronted variant of dialectal rajahtaa, which is probably akin to raikua (compare kaikua ~ kajata); roughly räj- + -ähtää.