Green’s Dictionary of Slang

bulldag v.2

(US) to adopt lesbian sexuality.

Randolph & Legman ‘Unprintable Ozark Folksongs & Folklore (1992) II 789: Two women indulging in any form of homosexual practice are said to be bull-dagging.
D. Wepman In the Life 179: bull-dag vi Practice lesbianism.
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