NERVY
brash, cheeky, nervy
(adjective) offensively bold; “a brash newcomer disputed the age-old rules for admission to the club”; “a nervy thing to say”
nervy
(adjective) showing or requiring courage and contempt of danger; “the nervy feats of mountaineers”
edgy, high-strung, highly strung, jittery, jumpy, nervy, overstrung, restive, uptight
(adjective) being in a tense state
Source: WordNet® 3.1
Etymology
Adjective
nervy (comparative nervier, superlative nerviest)
(US) Having nerve; bold; brazen.
(British) Feeling nervous, anxious or agitated.
(archaic) Strong; sinewy.
(technical) jittery; having unwanted signal characteristics.
Source: Wiktionary
Nerv"y, a. [Compar. Nervier; superl. - iest.]
Definition: Strong; sinewy. "His nervy knees." Keats.
Source: Webster’s Unabridged Dictionary 1913 Edition