Piccione
A rabid pigeon commonly found in Italy or the streets of New York City.
That bastard Piccione just hit my window.
unwarranted piccione
The act of having an over-inflated sense of one's ability despite no evidence supporting this belief
Gibbo: 'I swear that if I stayed off the piss I could have run the 100m at the Commonwealth Games'
Everyone: 'Gibbo that's unwarranted piccione and you fucking know it'
Everyone: 'Gibbo that's unwarranted piccione and you fucking know it'