What is mhw bombardier?

"MHW Bombardier" most likely refers to the skill of the same name in the video game Monster Hunter World.

The Bombardier skill increases the damage of explosive attacks, such as bombs and gunlance shells, by 30%. It can be obtained through certain armor sets, decorations, or by consuming a Demondrug item while having the Felyne Bombardier food skill activated.

This skill is particularly useful for players who like to use explosive-based weapons or tactics, as it can significantly increase their damage output.