barrelhead

[bar-uh l-hed]

noun

Idioms

on the barrelhead, in advance or on demand: They won't deliver the merchandise unless we pay cash on the barrelhead.

Origin of barrelhead

First recorded in 1830–40; barrel + head

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

After all, he provides “cash on the barrelhead” in exchange for a form of reality TV—college and professional sports.
Rupert Murdoch Goes All-In on College Sports
Evan Weiner
March 11, 2013

If Earthmen wanted anything from them, the terms were cash on the barrelhead.
A World by the Tale
Gordon Randall Garrett
Nevertheless, the headaches had for years made the transference of fishing to someone for cash on the barrelhead a temptation.
The Bounty of the Chesapeake
James Wharton