klámhögg (ON) noun

Literally ‘a foul strike’; a blow shameful to the person struck. A klámhögg is a strike from behind across the buttocks and was probably considered a kind of sexual attack intended to shame the victim. It is described in saga literature in Hrólfs saga kraka and Hrólfs saga Gautrekssonar. In Grg Víg 86 it is classified as a major wound, and the victim had the right to vengeance up until the General Assembly, after which the attacker could be prosecuted and outlawed.

shame-stroke OIce Grg Vís 86 Refs:

CV; F; KLNM s.v. ærenkrænkelse; Jochens 2001; Miller 1990, 63; Z