stone cold 
adjective
Completely cold: his untouched tea was stone cold the stone-cold corridor figurative his face when I got up close was stone cold...
- I also had a respectable pea and locally cured ham soup, full-bodied and intriguingly pea-y, and some sea bass that was served limp and almost stone-cold on cold mash with an irrelevant balsamic reduction.
- And while he has the stone-cold savvy to pull off elaborate swindles, he also suffers from a plethora of facial ticks, spends days on emergency housecleaning jobs and feels compelled to open and close doors three times.
- To those who were around in the Fifties, the term ‘rented accommodation’ conjures up images of dismal bedsits with spluttering, ever-hungry gas fires and stone-cold shared bathrooms.
adverb (stone-cold) [as submodifier]
Completely: stone-cold sober...
- Your humble scribe will be spending his New Year's Eve stone-cold sober on a train somewhere between Reading and Weymouth.
- The cruel punch line is that so little of consequence actually occurred in Vol. 1, it's possible to walk into this second movie stone-cold clueless and not miss out on a thing.
- Although the contents of the note are very emotional, the block letters are written as if by the hand of a stone-cold psychopathic assassin, and not by someone about to kill himself.