A ragarse is one whom pushes so hard during the act of shitting, that there insides bulge out words. This gives the appearance of a raghanging out the arse.
To be so intoxicated the you have to squint to see properly, have no sense of balance, no depth perception, and have almost completely lost the ability to speak.
Dan was so ratarsed that he fell into the bouncer and was thrown out of the premises.