Find the word definition

Wiktionary
big wow

interj. A sarcastic variant of wow.

Wikipedia
Big Wow

Big Wow is an alternative rock band formed in Chicago, Illinois. Big Wow consists of John Cline (vocals/guitars), Anne Malatesta (bass/vocals) and Ian Whitney (drums).

Big Wow (album)

Big Wow is the second album by Scottish rock band Whiteout, released in 1998 (see 1998 in music). Andrew Jones and Stuart Smith—who were members of Whiteout when they started out in 1994—had left the band after the release of their first full-length album, Bite It, in 1995. The two remaining members, Paul Carroll and Eric Lindsay, continued as a three-piece band together with a new drummer who is only named "Fudge" in the album liner notes.