Interpretation semantics for this word are undefined.
Compilation:
( C: -- orig )
Put the location of a new unresolved forward reference
orig onto the control flow stack. Append the run-time
semantics given below to the current definition. The semantics
are incomplete until orig is resolved (e.g., by
THEN).
Run-time:
( -- )
Continue execution at the location specified by the resolution
of orig.