Hair
Both the movie and the musical were dreadful...a tin-pan alley version of the anti-war hippy experience.
A series of stereotypes strung together by cliches
Many of the songs defined "stupid":

Gliddy glub gloopy
Nibby nabby noopy
La la la lo lo
Sabba sibby sabba
Nooby abba nabba
Le le lo lo
Tooby ooby walla
Nooby abba naba
Early morning singing song

Gloopy, indeed