hallucinant

mind-blowing, unbelievable

a . l y . s i . n ɑ̃
hallucin hallucinate + ant forming present participles and agentive adjectives
adjective Rare #45,601
mind-blowing, unbelievable Often used informally to express strong surprise (positive or negative).
FR: C’est hallucinant comme il a changé en un an.
EN: It’s unbelievable how much he’s changed in a year.

C'était hallucinant.

It was mind-blowing.

Et si je faisais quelque chose de vraiment hallucinant.

What if I did something truly mind-blowing?

— Insaisissables 2 (2016)

C'est hallucinant.

It's mind-blowing.

Le prix en est tout simplement hallucinant.

The price is simply mind-blowing.