The state of not having an erection during a blowjob or handjob.
James only got a half bone when Kassi blew him.
by notyourmom March 01, 2008
The state of a penis being in between flaccid and erect; distinctly characterized by being enlarged with blood, but not quite being hard.
"I went to an Avenged Sevenfold concert and met the band. Is it gay if I popped a half bone?"
by Slimjimsbathtub September 21, 2011