Whump!
is the
sound of
something with
massive amounts of both
mass and
acceleration (
therefore creating a
massive amount of
force, per
Newton's
equation) hitting
something else.
Whump!
It can also be the sound of failure walloping your head like Mike Tyson
Whump!
or the
sound of a
clue by four breaking your
knees Whump!
or
anything you
may think it sounds
like.
Whump!