Green’s Dictionary of Slang

brutally adv.

[brutal adj. (2)]

(US teen) completely, utterly.

[US]Eble Campus Sl. Nov.
[US]A. Heckerling Clueless [film script] You know, I am so glad I never did it with someone I had lukewarm feelings for. Christian is brutally hot, and I am going to remember tonight forever.