The phrase originates from the horse breed, Lusitano. The Lusitano is considered one of the best breeds in the world, but once old, like a car or aging prostitute, its value decreases rapidly before it is thrown to the knackers yard.
'Come on, start you Lusitano Nag!' - Said by a person attempting to start their banger on a cold wintry day.
It is also the kind of persistent appeal for approval that certain people make, and that other people get real tired of real quick.
An9ialist: Where's my definition? Who rejected zziadfuoqpoir?
12:05 and 15 seconds:
An9ialist: Who rejected my zziadfuoqpoir definition? Come on!
CharlieTheFrong99ish: God, don't be such a Lusitano nag. Get a life!
12:07 and 37 seconds:
An9ialist: Who rejected my zziadfuoqpoir definition? Some idiot did it, who?