damage stacking

A term used in video gaming to describe damage (HP) to an enemy. For example, if one molotov causes 50 HP, then throwing 3 molotovs at something in rapid succession will cause the additional damage to add on, or stack, to the current damage per second. Example: if I throw one molotov, I will cause 50 damage. Throwing 2 more molotovs will cause 150 damage per second. (50+100 (2 more))

Throwing 2 molotovs at the Tank in L4D2 causes damage stacking - twice the damage per second.