Wiktionary
boned up
vb. (en-pastbone up)
Usage examples of "boned up".
Gerrick blushed scarlet and scurried across the office, covered with all too obvious confusion, and it occurred to her that he'd probably boned up on the way things ought to go.
Had he boned up in advance and tried to catch the Hawkinsite in an error?
He'd boned up a little on the distinctive dress of the various religious orders within the Catholic Church and from the looks, this guy was a Jesuit.
They were used to its occasional random twitches during her lectures, but they also seemed to have boned up on the prosthesis enough to know about the software overrides.