Meyer, Mullen, and Vanhala analysed the inscription SECVNDINVS CACOR accompanying the carving of a phallus on a stone excavated at Vindolanda and explained CACOR as the present
passive of the verb cacare ‘to shit out’. I suggest that CACOR may have been intended in abbreviation of CACORVM, the neuter genitive plural of the adjective cacus, a transliteration of the Greek κακός ‘evil’, and that the phallus is depicted ejaculating over this word to symbolise its apotropaic power over evil.