Debuff

Debuff;

Definition
A hurtful aura.

Examples

 * "You should keep up the stack of debuffs on the boss."
 * "The boss has a nasty debuff."

Mechanics
A debuff is any aura that is placed on your or that you place on a target which is harmful. Buffs can be viewed to the left of your minimap, in the upper right of your screen. Debuffs can sometimes be removed by priests, but some you simply must suffer through til they fade.