Problem child
Problem child may refer to a child who is particularly difficult to raise or educate, especially due to disruptive or antisocial behavior.
Problem child may also refer to:

Film, television and theatre
Problem Child (film), a 1990 comedy film directed by Dennis Dugan, with two sequels and a derivative TV series
Problem Child (TV series), an animated series based on the films
Problem Child, a 1997 Canadian drama, from the six-play cycle Suburban Motel, written by George F. Walker
"Problem Child", an Instant Star episode
"Problem Child", an Umineko no Naku Koro ni episode

Music
Problem Child, a 1980s band featuring Louis Prima Jr.

Songs
"Problem Child" (The Damned song)
 "Problem Child" (The Beach Boys song), a 1990 single
"Problem Child", a song from the 1976 AC/DC album, Dirty Deeds Done Dirt Cheap
"Problem Child", a song by Glue Gun from The Scene Is Not for Sale
"Problem Child", a song by Roy Orbison from Roy Orbison at the Rock House
"Problem Child", a song by Doyle Bramhall II & Smokestack from Welcome
"Problem Child", a song by pop-punk band Simple Plan from Taking One for the Team
"Problem child", a song by Graham Parker and The Rumour

Other uses
Problem child (growth–share matrix), an embryonic, start-up fund dependant, commercial endeavour archetype
The Problem Child, a 2006 Sisters Grimm novel by Michael Buckley
Problem Child, a boat that set a speed record
LSD: Mein Sorgenkind (LSD: My Problem Child), a book by Albert Hofmann