Stagger

Stagger is a debuff that appears next to your defense in your prompt. It
represents a general lack of balance or short term fatigue in combat.

Supernaturals take stagger from specific types of weapon augments, and
it can also be applied by toxins, by talking in combat or by being hit
above your round damage cap.

Stagger decreases your damage and movement speed. It goes down every round
and goes down faster if your character is not moving and/or has higher stamina.