a (colloquial|usually with for or about) Extremely enthusiastic about; crazy about; infatuated with; overcome with desire for.
a (slang|chiefly Northeastern US) Intensifier, signifies an abundance or high quality of a thing; very#Adverb | very, much or many.
a (slang|New England|New York|and|UK|dialect) Intensifier; to a large degree; extremely; exceedingly; very; unbelievable|unbelievably.