Allora, avrei trovato una soluzione ma non so se è corretta, la lascio nelle risposte lo stesso.

L'ho interpretato come non voglio rischiare di restare scoperto o non voglio restare senza precauzioni perché sul dizionario di slang americano ho trovato questa cosa

plastic

noun 1 a credit card; consumer credit in general US, 1979 • These were fifteen-thousand-a-year guys—not paying with plastic, either: hard-earned green. — Vincent Patrick, The Pope of Greenwich Village, p. 13, 1979 • Carol was the Queen of Plastic. She could have written books on how to make two grand a day from a hot American Express card. — Gerald Petievich, Money Men, p. 35, 1981 • It costs me fifteen bucks for the cab to LAX and a hundred twentynine bucks on my plastic to New Orleans. — Robert Campbell, In La-La Land We Trust, p. 262, 1986 • What the sponsor will do is give the kid some plastic and about $500 in cash a week[.] — Dan Jenkins, Dead Solid Perfect, p. 22, 1986 2 a condom US, 1993 • I always pack the plastic. I ain’t goin’ out like Willy Lump-Lump. — Menace II Society, 1993 3 a Glock handgun US, 2005 • I handle my plastic, gunplay I mastered. — RZA, The Wu-Tang Manual, p. 177, 2005
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spero renda l'idea