A girlfriend who constantly shows up unannounced wherever her boyfriend is, like a party or a friend's house, to haul him away. Even if the party is lit, when the Grua arrives, the guy has to drop everything and leave with her. If he doesn't, he'll either get dumped or be in the doghouse for days (literally: a tow truck).
A: Man, did you tell your girlfriend you were coming to this party? B: No, why? A: Well, the Grua just arrived to pick you up already.
A collector for illegal gambling who picks up money and betting slips from local shops, acting as the middleman for the underground lottery. (In Argentina, the quiniela is a popular lottery game that often operates through these unofficial networks to bypass government taxes and regulations).
Better give the numbers to the kiosk owner now because the Grua is about to come by and he won't take any more bets after that.
An Argentine lunfardo term for a female sex worker, typically one who solicits clients on the street. (The word literally means tow truck, referring to the way they pick up people).
That red-light district in Palermo used to be full of grúas every time the sun went down.
A Lunfardo term for a pickpocket or petty thief specialized in lifting items from people's pockets. It refers to a criminal with the skill to snatch belongings without the victim noticing (Lunfardo is the traditional slang of Buenos Aires).
Julian's uncle had his wallet swiped on the subway, it is clear some Grua was taking advantage of the crowd.