Brit. affectedly clever, dainty, sweet, etc.
Origin of tweeback-formation ; from tweet, in same sense ; from child's pronunciation of sweet
Overly precious or nice.
Origin of tweeAlteration of tweet, baby-talk alteration of sweet.
(comparative more twee, superlative most twee)
From a childish pronunciation of sweet. The Oxford English Dictionary records the first use in 1905 in Punch.