pop

pop /pop/  [from the operation that removes the top of a
   stack, and the fact that procedure return addresses are usually
   saved on the stack] (also capitalized `POP') 1. vt. To remove
   something from a {stack} or {pdl}.  If a person says he/she
   has popped something from his stack, that means he/she has finally
   finished working on it and can now remove it from the list of
   things hanging overhead.  2. When a discussion gets to a level of
   detail so deep that the main point of the discussion is being lost,
   someone will shout "Pop!", meaning "Get back up to a higher
   level!"  The shout is frequently accompanied by an upthrust arm
   with a finger pointing to the ceiling.