1946 K. Tennant Lost Haven 66: He had been pleased to see her, ‘the cows bellering their heads off, as if they’d been on the grog and got a headache themselves.’.at on the grog (adj.) under grog, n.1
1946 K. Tennant Lost Haven (1947) 171: He was properly out to it that night. We made speeches about how sorry we was to see him go.at out to it, adj.