Definition of "biggy"

biggy

/ˈbɪɡi/

noun
plural biggies
1. (colloquial) Something large in size in comparison to similar things.
  Quotations
  There were four sizes of marbles and we called them boulders, biggies, regulars, and teenies.
  2006, Carol Benson, The Old Lonesome, page 84
2. (colloquial) Something impressive in comparison to similar things.
3. (colloquial, chiefly in the negative) Big deal.
4. (originally US, colloquial) A person of importance or power, especially in the entertainment industry.