paradoxical laughter

Paradoxical laughter is an exaggerated expression of humor which is unwarranted by external events.

Paradoxical laughter is indicative of an unstable mood, often caused by the pseudobulbar affect, which can quickly change to anger and back again, on minor external cues.

According to the emotion it is expressed with: relief, mirth, joy, happiness, embarrassment, apology, confusion, nervous laughter, paradoxical laughter, courtesy laugh, evil laughter.