The Vietnamese word "hất hậu" refers to the action of kicking, particularly in the context of a horse kicking backward. It describes a specific movement where the horse lifts its hind legs and strikes out, which can be a defensive or aggressive action.
In a broader context, "hất hậu" can also be used metaphorically to describe someone who retaliates or reacts strongly to a situation. For example, if someone responds aggressively to criticism, you could say they are "hất hậu" in their reaction.
While "hất hậu" primarily refers to the action of kicking, it can also imply a sudden or unexpected reaction in a metaphorical sense, similar to how someone might lash out verbally.