Badly, derived from хуево with a diminutive suffix.
Ну мы вроде сеня собирались да погода хуеватая.
Well, we were going to do it today but the weather is fucked up.
(Kamach @ mail.ru, 08/2011)
хуеватый adj [huevatyj] (мат)
Phrasebook • Money slang • Political insults • Пиздец! the book • Transliteration of Cyrillics • Telegram channel