A characteristic tightness and or plumpness which a
woman's (or man's)
bum displays upon observation. This particular type of
bum will instantly imprint an image of a tight, lubricated and hot bum in the viewers mind upon observation.
Jody: "Keith!, Keith are you listening!?"
Keith: "Sorry, I couldn't
help thinking about your
bum, it's a smiggle
bum!"
*Jody slaps keith and walks away