a word popularized by, if not coined in, the song "Mairzy Doats," from jive (n.) + -y (2). As to sense, it has meant "jazzy, swinging," but also "phony, fake."
Entries linking to jivey
jive n.
"empty, misleading talk;" also a style of fast, lively jazz and dance music," 1928, American English, from jive (v.1). Used from 1938 for "New York City African-American slang."
-y 2
adjective suffix, "full of or characterized by," from Old English -ig, from Proto-Germanic *-iga- (source also of Dutch, Danish, German -ig, Gothic -egs), from PIE -(i)ko-, adjectival suffix, cognate with elements in Greek -ikos, Latin -icus (see -ic). Originally added to nouns in Old English; used from 13c. with verbs, and by 15c. even with other adjectives (for example crispy). Adjectives such as hugy, vasty are artificial words that exist for the sake of poetical metrics.