What Does BD Mean?

You backdoor (BD) by attacking an enemy turret or inhibitor without a minion wave. Backdoor is also commonly used to describe tower-pushing when all enemies are too far away to do anything. Due to the risk of backdooring, champions like Nidalee who can escape well and others like Shen who can join a team fight, are most suited to a BD.

Example: We need to BD the inhibitor