délirer
to rave, to be delirious
verb deh-lee-REH Less Common
Origin: Latin 'delirare'
Also means
to be crazy about (informal)
Usage Note
Délirer can describe medical delirium (fever-induced) or, very commonly in colloquial French, being utterly obsessed with something (je délire sur ce film = 'I'm totally into this film'). Tu délires! is a casual way of saying 'You're crazy!' or 'No way!' The noun le délire means both delirium and frenzied excitement.
Examples
"Il délire complètement depuis hier soir."
Natural Translation
He has been completely delirious since last night.
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