ลูกหลง

Etymology
From 🇰🇲.

Noun

 * 1)  child born after another child for many years, such as Benjamin of the family.
 * 2)  projectile unknowingly left in a gun.
 * 3)  projectile or any other thing which hits an unintended target, such as stray bullet.
 * 4)  side effect; collateral effect.