To beocme ready and excited for something, to prepare for it. The literal meaning is to get a hard on, or erection which is a preperatory step for copulation.
figurative example- "Anton, are you all boned up for the three hour swim set?"
literal example- "She was disappointed that he couldn't get boned up, however hard he tried."
The past tense of bone up, meaning literally to have an erect penis, or figuratively to be aroused, excited, or enthused.
Damn, girl, you got me all boned up, and now I gotta tape it to my leg.