(adj) when something is so buttspankingly good that everyone experiences a boner and/or an orgasm, metaphorically speaking.
Of course, a very good thing can be orgasmic, bonertastic or simply boneriffic, but for the full 10020% of awesomefulness, bonergasmic does the job. Used extensively by teens in Northcote and Preston.
'wow, this ice-cream is bonergasmic'
'how was school?'
'boner(pause)gasmic! The maths teacher was sick and we got to watch dvds all day'
'sick!'
The feeling of relaxation when laying down on a bed and you feel all your bones just absolutely melt, releasing all the tension in your body. Sometimes accompanied by moaning really loudly out of comfort