A common turn of phrase used to desribe gentlemen running a satisfactory level of customer service and product quality in any business, often said when drunk to a kebab shop owner, a tesco employee or even a taxi driver.
Andy: *In yateley kebab house* *with beer in hand* one kebab please good sir
Ahmet (owner of best kebab yateley): coming right up sir
*within 5 minutes perfect kebab given with a smile*
"you frosty?" Uses the same meaning as the statement "stay frosty", meaning stay cool or calm. So "you frosty?" Is asking if the other individual is cool, calm, or in a good state of mind.