Medical conditions and diseases

• trismus
  Trismus
  -Common causes:*Pericoronitis is the most common cause of trismus.*Inflammation of muscles of mastication. It is a frequent sequel to surgical removal of mandibular third molars . The condition is usually resolved on its own in 10–14 days, during which time eating and oral hygiene are compromised...
  
  , a pathological condition in which the mouth is held shut by sustained spasm of the masseter (jaw) muscle, often observed in cases of tetanus.
• tetanus
  Tetanus
  Tetanus is a medical condition characterized by a prolonged contraction of skeletal muscle fibers. The primary symptoms are caused by tetanospasmin, a neurotoxin produced by the Gram-positive, rod-shaped, obligate anaerobic bacterium Clostridium tetani...
  
  , an infectious disease of the central nervous system.

In music

• "Lockjaw", a Linkin Park
  Linkin Park
  Linkin Park is an American rock band from Agoura Hills, California. Formed in 1996, the band rose to international fame with their debut album, Hybrid Theory, which was certified Diamond by the RIAA in 2005 and multi-platinum in several other countries...
  
   instrumental song.
• Lockjaw (band)
  Lockjaw (band)
  - Members :* Gary Bower - vocals* Stuart Hinton - guitar* Simon Gallup - bass* Martin Ordish - drums- Discography :* Radio Call Sign / The Young Ones in November 1977...
  
  , a UK punk rock band from the 1970s.
• Eddie "Lockjaw" Davis
  Eddie Davis (saxophonist)
  Edward Davis , who performed and recorded as Eddie "Lockjaw" Davis, was an American jazz tenor saxophonist.-Biography:...
  
  , a jazz saxophonist (d. 1986).
• Lockjaw (album), the Dance Hall Crashers
  Dance Hall Crashers
  Dance Hall Crashers is an American ska punk band formed in 1989 in Berkeley, California.-Early years:The original incarnation of the Dance Hall Crashers was formed in 1989 by Matt Freeman and Tim Armstrong, formerly of the seminal Bay Area ska-punk band Operation Ivy, after both musicians...
  
   1995 album.

In sociology and linguistics

• Locust Valley Lockjaw
  Locust Valley lockjaw
  Locust Valley Lockjaw is the colloquial term for a stereotypical upper class American accent associated with elite residents of the New York metropolitan area, particularly those on the North Shore of Long Island...
  
  , an upper-class American accent.