Green’s Dictionary of Slang

budli-budli n.

[Urdu badli, change, used in late 19C as colonial era sl. for a locum tenens and in 20C Indian vernacular as a temporary employee]

sodomy, thus attrib. taking turns at performing anal intercourse.

1949
1950196019701980
1988
[UK]Partridge DSUE (3 edn) 1002/1: budli-budli or –ly. Sodomy: low, esp. in India.
[US]Trimble 5000 Adult Sex Words and Phrases.
J. Robinson Jack & Jamie Go to War 46: ‘You’re only a red-arsed recruit! If I had you in India, you’d be my buddly-buddly boy.’ The term ‘buddly-buddly’ was Hindi for ‘change about’; roughly translated in the language of the soldier, it meant: You do me, I do you [Simes:DLSS].