This is the act of deviously promoting a fellow hackling by voting for his story in competitions or by writing artificial letters of praise in his favour to magazine editors, etc. The unspoken understanding is that a hackling who arsebollocks (also a verb) another hackling will be arsebollocked in return. When arsebollocking reaches an absurd intensity it becomes Hazardous Flapdoodle.
Knobworking is a form of Arsebollocks.