Be broke

Be flat broke / Be dead broke / Be in financial straits / Not have a red cent to one's name / Be down and out


Essere al verde

Essere in bolletta / Essere a terra / Essere uno spiantato / Non avere un soldo


Meanings

To be penniless; to have no money.
(informal)

Examples
They returned flat broke from a gambling weekend in Las Vegas: they lost everything, even the shirt off their backs
Per colpa del gioco sono ridotti al verde; durante un fine settimana a Las Vegas hanno perso tutto, anche la camicia

I'm sorry but I can't help you out. I can't lend you any money, I'm broke myself
Mi dispiace ma non posso aiutarti. Non posso prestarti nemmeno cinque Euro perché sono completamente al verde anch'io

Anyone can be broke sooner or later, but to steal is a different ballgame
Tutti possono trovarsi in difficoltà finanziarie prima o poi, ma rubare è un altro discorso

Origin
The word broken had been used to mean “impoverished / no money” since 1590. In the 18th century it was shortened to broke, still keeping the meaning of “having no money”