Lightning football is a shortened variation of Australian rules football, often played at half of the duration of a full match.
Lightning football is typically used as a means to accommodate a small tournament inside a single day or weekend, particularly at junior or amateur level; these tournaments are generally known as lightning premierships or lightning carnivals. At the top level of Australian rules football, lightning matches have most recently been staged as part of the Australian Football League pre-season competition.
The use of the word lightning, as a synonym for "fast", to describe an Australian rules football tournament appears to have originated with the first lightning carnival staged by the South Australian National Football League (SANFL) in 1940. The term may have been adopted from its use in chess, which had used the word lightning in the same context for many years: "lightning chess" tournaments were seen in Australia from as early as 1909, and were played under modified rules in which players were allowed at most ten seconds to make each move, allowing an entire tournament to be completed in just a few hours.
In a preview of the 1940 SANFL Lightning Carnival, the Advertiser journalist Jim Handby discussed the suitability of the name; while he surmised that the choice of name was primarily due to the short time over which the premiership was decided, he speculated that the shortened matches could lead to a particularly high-paced style of gameplay.
The term "lightning premiership/carnival" has generally entered the Australian vernacular for a condensed carnival of shortened matches in any game or sport. The term was, for example, attributed to a 1945 South Australian seven-a-side rugby union tournament, long before the sport of rugby sevens was formally codified.
Unlike other abbreviated sports, such as Twenty20 cricket or rugby sevens, lightning football is not a strictly codified sport in its own right. In many cases, the length of the game is the only difference in the rules between the full and lightning versions of the game; in other cases, some rules are modified for lightning matches.