A flex from Tekashi 6ix9ine may lead to a hit to his bank account.

The troll rapper wanted everyone to know he took his girl on a Chanel shopping spree so he posted a series of photos of said spree.

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In one of them, he exposes part of his Amex card.

Lil Yachty has taken note. 

"He A real one for giving us those last 4 to his Amex card," Yachty quipped

Boat recently complained of his 52K a month overhead.   Do you think he can find the rest of 6ix9ine's numbers?