What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
noun
1archaic A silly or flirtatious young woman.
2archaic A kind of small firework.
3Australian informal A police informer.
informantView synonyms
Origin
Early 16th century: probably from fizz + obsolete gig ‘flighty girl’. Compare with gig and whirligig.
