As opposed to 'a little bit', "A LOTTA BIT" expands the value of a specified term to a greater extent.

As opposed to 'a little bit', and 'a lotta bit', "A WHOLE LOTTA BIT" expands the value of a specified term to an even greater extent than both those previous terms.

As opposed to 'a little bit', 'a lotta bit', and 'a whole lotta bit', "A WHOLE HECKUVA LOTTA BIT" expands the value of a specified term to an even greater extent than the three previous terms.

adjective.

A more than colossally large amount; indescribable amount