This is the 3975th most frequent French word.
bombe
"Bomb" or "explosive device."
Here, 'bombe' is used colloquially to describe something exceptionally good or impressive.
Cette recette de gâteau est une bombe!
This cake recipe is amazing!
In this sentence, 'bombe' refers to an explosive device, the literal meaning.
Ils ont désamorcé une bombe hier soir.
They defused a bomb last night.
Used figuratively, 'bombe' describes someone who is very attractive or captivating, typical in informal French.