ثجر1 ثَجَرَ, aor. ـُ He mixed the ثَجِير of dates [i. e. the dregs of pressed dates] with other [dates] in the beverage called نَبِيذ: (S:) or he mixed the dregs of pressed unripe dates with dried dates in making نبيذ: (Mgh:) or ثَجَرَ التَّمْرَ he mixed the dried dates with the dregs of pressed unripe dates. (K.) The doing so is forbidden in a trad. (S, Mgh.) ثَجِيرٌ, an arabicized word, (Msb,) pronounced  by the vulgar with ت, (S, Msb,) The dregs of anything that is pressed; (S, A, Mgh, Msb;) as of pressed unripe dates: (K:) or the dregs of pressed unripe dates, which are mixed with dried dates in making the beverage called نَبِيذ: (TA:) or the expressed juice of dates; or the dregs of pressed dates: (As, Msb:) or pressed grapes from which the juice has run, and of which the dregs remain. (Lth, TA.)