An event can be classified as situationally ironic when it deviates fr
om routine in certain ways. In Study 1, a taxonomy of situational iron
ic event kinds was developed and features of these events were identif
ied. Features included unexpectedness, human frailty, opposition, and
outcome (the experience of loss or win). Study 2, category production,
and Study 3, goodness-of-exemplar ratings, showed that individuals ha
ve a situational irony concept, consisting of representations of event
kinds. These events exhibit typifying features, giving the concept gr
aded structure. On this basis, knowledge of ironic events is claimed t
o be a form of event knowledge, along with but distinct from the event
schema or script. The processing of ironic events, their relation to
humorous and tragic events, and the relation between situational and v
erbal irony are discussed.