ludicrous
The new airline is offering ludicrously cheap flights.
It was a rare case of ludicrously inflated expectations being totally and radiantly fulfilled.
He has a ludicrously overblown sense of his own importance.
SMART Vocabulary: related words and phrases Stupid and silly
absurd
absurdity
absurdly
adolescent
against your better judgmentidiom
dopey
dopily
dorky
dottiness
dotty
imprudently
in his/her/their wisdomidiom
in someone's infinite wisdomidiom
inadvisable
injudicious
uncritical
uncritically
undiscriminating
unintelligent
unperceptive
You can also find related words, phrases, and synonyms in the topics:
Humour & humorous