DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   register spilling
   spill
      <programming, compiler> (By analogy with spilling the contents of
      an overfull container) When a compiler is performing the
      register allocation phase of generating machine code and there
      are more live variables than the machine has registers and it
      has to transfer or "spill" some variables from registers to
      memory.
      (2014-08-02)