barrelhead noun 1forms 1phrases 1 noun1 •The head of a barrel, especially when the barrel has been stood vertically and its head thus serves horizontally like a tabletop. formsbarrelheads Phrases with barrelhead cash on the barrelheadMoney in the form of paper currency or coins, paid immediately at the time and place of a transaction: cash only (no credit), and at the point of sale.