Green’s Dictionary of Slang

to experience childbirth; thus pupped, born; also in fig. use.

1843		‘Madison Tensas’ Louisiana ‘Swamp Doctor’ (1850) 146: He’s only been pupped ateen years.
1926		(con. 1918) L. Nason Chevrons 47: I was slinging hash in this man’s army before he was pupped.
1934		O. Strange Sudden 28: I ain’t a-goin’ to back down before all the Burdettes that ever was pupped, an’ that goes.
1943		R. Llewellyn None But the Lonely Heart 111: A real artist, Reverend, is sure of his self from the time he’s pupped.
1951		Cusack & James Come in Spinner (1960) 28: Crikey! L. F. must have nearly pupped on the spot.
1963		C. Wood ‘Prisoner and Escort’ in Cockade (1965) I iii: Royal family and tarts about to pup should they ask.
1969		P. Boyle All Looks Yellow to the Jaundiced Eye 65: Remember, there was never a woman pupped that was worth the loss of a night’s sleep.