Informal, chiefly North American; used as a flat adverb meaning "extremely" or "in a crazy manner".
trèsEmploi familier, intensifieur. She works crazy hard during finals week.
Elle travaille très dur pendant la semaine des examens.
Used as an exclamation to convey surprise, excitement, or disbelief.
Crazy! I never thought we'd make it this far.
Incroyable ! Je n’ai jamais pensé qu’on irait aussi loin.