ˌstone-ˈcold adjective, adverb

1. if something is stone-cold, it is completely cold even though it should be warm or hot:
Dinner was stone-cold by the time I got home.

2. stone-cold sober having drunk no alcohol at all

3. American English if a player or sports team is stone-cold, they are not able to get any points

[TahlilGaran] Dictionary of Contemporary English ▲

stone cold
adj. Having no warmth; completely cold.
■ Used to describe things that are better when warm.
The boys who got up late found their breakfast stone-cold.
The furnace went off and the radiators were stone-cold.

[TahlilGaran] English Idioms Dictionary ▲