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adverb: to do something in a covert manner; sneaky, sly-like, trained, well - prepared, and often slightly under handed or with a unknown agenda.

"Ishmael boycisously entered the garage"

Derived from the well trained marine, Boyce Eugene helms Jr.(aka Woodstock), helicopter crew chief.
Ishmael boycisously entered the neighbors building.
by AmatoryTeachers November 29, 2016
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