erratic; eccentric; wild; unconventional
Describes ideas, behavior, or style that is strikingly unusual, unpredictable, or out of the ordinary. Often carries a nuance of being so unexpected that it surprises or shocks.
I'm always surprised by his wild ideas.
That fashion is too outlandish; no one can imitate it.
Standard kanji spelling.
Kana spelling is common in casual writing.
Compound of 突 (thrust, sudden) and 飛 (fly, leap), suggesting something that suddenly leaps out or deviates from the norm. The exact historical derivation is uncertain.