knobbing

noun5

1. •
   A pattern of knobs or lumps.

   • Consequently, the knobbing is most marked at the costochondral junctions of the ribs, the lower end of the femur , both ends of the fibula and tibia , and the upper end of the humerus . — 1950
2. •
   (slang, vulgar) A session of penetrative sexual intercourse or the act of sexual penetration.

   • A knobbing is over before you know it and no harm done to the family but the shame of a dirty photograph can follow a husband into his grave . — 2013
3. •
   The process of rough dressing stone; the act of cutting off projecting points from quarried stone.
4. •
   The practice of cutting off the sharp tips of the horns of cattle, leaving rounded knobs.

   • Could those that are a little dangerous be rendered harmless by knobbing? — 1892
5. •
   The amount by which a bowl is wider in the middle than at the top and bottom.

   • The degree of knobbing varies according to the conditions of working and varies between 2 mm . and 8 mm . in circumference . — 1954