ricket1
/ˈrɪkɪt/English regional (chiefly London )
noun
A blunder, mistake.
Origin
1950s; earliest use found in Frank Norman (1930–1980). Origin unknown. Perhaps from rickety; perhaps compare also earlier rick. Alternatively perhaps shortened from ricochet.
ricket2
/ˈrɪkɪt/verb
[no object] With adverb or adverbial phrase: to move unsteadily; to lurch.
Origin
Early 19th century. Probably a back-formation from rickety.