Big Boo
Big Boo may refer to:

Big Boo, a larger and stronger version of Boo in the Mario franchise
Carrie "Big Boo" Black, a character in the television series Orange Is the New Black (2013)

See also
 Boo (disambiguation)
 Big Bad Boo, Canadian production company
 Big Bam Boo, 1980s British pop/rock duo
 Boo Boo (disambiguation)
 "Bug a Boo" (song), a 1999 single by US pop group Destiny's Child