Irony is when we say one thing but mean another, usually the opposite of what we say. When someone makes a mistake and you say, “Oh! that was clever!”, that is irony. You’re saying ‘clever‘ to mean ‘not clever’.
Expressions we often use in an ironic fashion are:
ï Oh, wasn’t that clever!/Oh that was clever!
ï You have been a great help, I must say!
ï You’ve got yourself into a lovely mess, haven’t you?
ï Oh, very funny!/ How funny!