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1. To conceal one's gender (male only)
2. To hide one's penis from view.
The hooker's client got really upset when he found out it was bone smuggling.
by Lunchbox March 28, 2003
Anal sex, especially as practice by homosexual males. See also "bone smuggler".
Bruce and Julian met in the broom closet during their lunch break for a bit of surreptitious bone smuggling.
by Greenie August 21, 2003