usually said 'iiiroooonaaaaa!!!!' it is a word used to describe one's feelings towards an act of stupidity.
An uncle watches his nephew taunt hs daughter with a wasp.
The boy's mother pushes it into his face.
Nephew secreams like a girl. Therefore, being ironic towarsd the fact he was taunting a girl.
Uncle exclaims 'iiiroooonaaaaa!!!!'