Suicide Bomb is the Quirk that is used by Suicide Bomber in My Hero Academia: Vigilantes.
Nothing is known about the exact functions of this Quirk. However, as its name suggests, this Quirk seems capable of creating huge explosions that surround the user and destroy their surroundings.
Endeavor's Hellflame Quirk was described as the worst matchup against this Quirk, which implies that it can be set off from outside sources as well as its user's will.
It is also implied that this Quirk can kill its own user.