资料来源 : Webster's Revised Unabridged Dictionary (1913)

Overboil \O`ver*boil"\, v. i.
   To boil over or unduly.

         Nor is discontent to keep the mind Deep in its
         fountain, lest it overboil In the hot throng. --Byron.

资料来源 : WordNet®

overboil
     v 1: overflow or cause to overflow while boiling; "The milk is
          boiling over" [syn: {boil over}]
     2: boil excessively; "The peas are overboiled"