Definition 1 of 1
A person who is pitch drunk; stoned. The condition is verified to be" not reachable" if and only if such a blessed person does not respond to loud close range calling out using all his known names, aliases, monikers, and then nor does he react to rigorous shaking or dragging him a short distance on a dusty sidewalk or even to a dog relieving itself on him mistaking him to be a heap.
If you become 'not reachable' at the party, you will have to call a cab in the morning to get to office.
Added 2011-08-07 by I love Dtool