Meanings
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1
adj
Obnoxiously stupid; vacantly silly; content in one's foolishness.
A fatuous love affair can easily result in a fatuous marriage. A couple who hardly know each other and, indeed, may not even really like each other, make a commitment that has little chance of being honoured.
Thesaurus
Synonyms
1
adj
· obnoxiously stupid;...
addlebrainedaddlepatedairheadedass-brainedbee-brainedbeef-wittedbeefheadedbeetle-headed
Etymology
From Latin fatuus (“foolish, silly, simple”).