"To plant a bomb" means to hide or set up an explosive device in a specific location with the intention of causing harm or destruction. Full definition
I earned her loyalty by addressing her trauma in the most direct way we could: by planting a bomb in the test facility she was raised in. (pcgamer.com)
Doing this literally made it next to impossible to plant the bomb on the objective. (n4g.com)
Start planting bombs today and bring out your destructive side! (crazygames.com)