脱だっ線せん行こう為い

noun

aberrant behavior; escapade; acting out

Figurative use of 'derailment act'; describes behavior that deviates from expected norms, often in a social or moral context. Can range from mild eccentricity to serious misconduct.

• 彼かれの脱だっ線せん行こう為いには周しゅう囲いも呆あきれている。