a person, usually male, who you find to be generally irritating. A moron, douche bag, dumb ass, or dip-shit. The word is funny, yet derrogatory, so you can usually say it to anyone, and it will offend them and/or make them (and you) laugh.
Noun: Any male who somehow finds the courage to be extremely cocky towards other males but has absolutely no physical strength or muscularity; the cockiness displayed commonly includes the claimed ability hes an amazing fighter, trash talking a certain action or belief you have and contradicting what he said later, and brilliantly displaying his vehicle, apartment and abundance of expensive clothes that his dad still pays for.
He's such a Fagellett...he would get the crapbeatoutta him.
A fagaletti is one who is annoying, frustrating and acts like a real dickhead....the person described knows they are being a real pain in the arse.....
Person in the office is going around getting right in peoples faces being generally annoying, telling jokes that are not particularly funny and has really bad breath, from the previous night of eating a garlic based spaghetti....therefore that makes this person a fagaletti.
Or
Your driving along quietly and a person that has been riding up your arse for the last 10 minutes zooms past....as he passes you yell in an opera voice 'Fagaletti!'