crocker, croaker noun currency a groat, fourpence 19-20; historical: Compare grossum etymology: pre-decimalisation (1971) a groat was a coin worth four old pennies which ceased circulation in Scotland in the early twentieth century; perhaps crocker, croaker are developments of Romany gurushengre ‘things costing a groat’; attested by Galloway Tinkler-Gypsies; form croaker collected by McCormick