slipstring

noun

1. (obsolete)A wastefully extravagant person; a prodigal; a spendthrift.

   “Every promise that thou therein dost utter, / Is as sure as it were sealed with butter, / Or a mouse tyed with a threed. Every good thing / Thou lettest even slip, like a waghalter slipstring.”

   “Goinfre: m. A wag, ſlipſtring, knaviſh lad; a merrie conceited whoreſonne, a notable good fellow, an excellent companion.”

   “Well, slip-string, I shall meet with you.”