Source : Webster's Revised Unabridged Dictionary (1913)

Spirt \Spirt\, v. & n.
   Same as {Spurt}.

Source : WordNet®

spirt
     n : the occurrence of a sudden discharge (as of liquid) [syn: {jet},
          {squirt}, {spurt}]
     v 1: gush forth in a sudden stream or jet; "water gushed forth"
          [syn: {spurt}, {gush}, {spout}]
     2: move or act with a sudden increase in speed or energy [syn:
        {forge}, {spurt}]