pop open

:  to strike or knock sharply :  hit

:  to push, put, or thrust suddenly and often deftly

:  to cause to explode or burst open

:  a sharp explosive sound

:  a shot from a gun

:  soda pop

:  like or with a pop :  suddenly

:  father

:  popular : such as

:  of or relating to popular music

:  of or relating to the popular culture disseminated through the mass media

:  popular music

:  pop art

:  pop culture

: population

:  having no enclosing or confining barrier :  accessible on all or nearly all sides

:  being in a position or adjustment to permit passage :  not shut or locked

:  having a barrier (such as a door) so adjusted as to allow passage

:  to move (something, such as a door) from a closed position

:  to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)

:  to make available for or active in a regular function

:  opening

:  open and unobstructed space: such as

:  open air