A word game played with a set of lettered tiles. The basic idea common to all versions is that a common pool of facedown tiles are turned faceup one by one and players simultaneously compete to form words using these tiles (for example by calling 'APE' if the letters 'A', P' and 'E' were available in the pool). Points are scored for forming these words, but opponents can steal words by using those tiles to make another word, either on their own (an opponent could steal 'APE' by calling 'PEA') or in combination with common tiles (if 'T' was available in the pool, an opponent could steal 'APE' by calling 'PEAT'). The game ends when no more plays are possible.
Squabble is usually played with the lettered tiles from a Scrabble or Bananagrams set.