Jamie Dimon took aim at Coinbase Global Inc. Chief Executive Officer Brian Armstrong on television, calling him “full of sh-t” and vowing to fight back against digital-asset legislation making its way through Congress.

The banks “will not accept” the current version of the so-called Clarity Act, the longtime JPMorgan Chase & Co. CEO said in a Fox Business interview that aired Friday. The bill, which the Senate Banking Committee advanced earlier this month, has been the subject of a dispute between the banking and crypto industries.

Jamie Dimon and Brian Armstrong

Photographers: Samuel Corum, Aaron Schwartz/Bloomberg

At issue is whether crypto exchanges, of which Coinbase is the largest in …