Indication that a gentleman has given a vigorous and enthusiastic pounding to a consenting female. This practice often results in ruptions of internal organs and rendering the subject crippled for several days, almost like your gran. To smash the granny you do not need to be fussy. The granny can be smashed out of all of the mainstream orifices including the less popular but equally effective belly button smashing, reserved for ladies of a larger volume.

When you eat dirt for the first time and leave your family to build a shack in the woods