earth pig UK /ˈɜːθpɪɡ/US /ˈɝθpɪɡ/ noun1 •(nonstandard, rare) The aardvark.The curious ant-eaters (earth pigs and pangolins) are probably relics of an earlier fauna, which have survived owing to their nocturnal habits. — 1893 formsearth pigs · earth-pigs