A very foul fart that was perfectly timed, just as a banking deposit is made at the drive up window.
The most tasteless version of this involves driving a nasty fart into the deposit canister before sending it to the teller.
"I opened an account at the bank where my ex-wife works just so I can grace her with the occasional bank biscuit".
by sluggo699 February 16, 2009
5 Words related to bank biscuit

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