1º_ Plural of ember ("burning coal or log") . Thus, in the plural, it is a Localism used in Spain in locutions such as "ser un brasas" (for "dar la brasa, ser un pelmazo") or "en brasas" ("restless, annoying").
1 . Remains of a bonfire or similar where light and heat still emanate, but not fire, and is called incandescence. 2 . An adjective of colloquial use about a person who turns out to be repetitive and leaden about the same topic or issue.