Definition of wad:
a small mass of soft material; "he used a wad of cotton to wipe the counter"
(often followed by `of') a large number or amount or extent; "a batch of letters"; "a deal of trouble"; "a lot of money"; "he made a mint on the stock market"; "see the rest of the winners in our huge passel of photos"; "it must have cost plenty"; "a slew of journalists"; "a wad of money"
a wad of something chewable as tobacco
compress into a wad; "wad paper into the box"
crowd or pack to capacity; "the theater was jampacked"