Green’s Dictionary of Slang

dagger v.

(UK black) usu. of a woman, to dance provocatively, with much swishing of the hips.

hubpages.com ‘Roadman Slang 4 Jun. 🌐 Whining/Daggering - words used to describe intense Jamaican dance moves done by females, to genres like dancehall and jungle. This is seen at the Notting Hill Carnival every year.
[UK]G. Krauze What They Was 269: [of a man] I grab one big-batty Nigerian chick and start daggering her.