up- +‎ pour

uppour (third-person singular simple present uppours, present participle uppouring, simple past and past participle uppoured)

1. (rare, archaic, intransitive) To pour upward.
   • 1841, Augustus Bozzi Granville, Southern Spas, page 373:

     […] the sight of that profuse supply of volcanic water uppoured from the bowels of the earth, by that impetuous spring which presently fills the two ample reservoirs […]