What is the meaning of Ragga?

A subgenre of reggae and dancehall influenced by hip hop and digital production techniques such as sampling.

Clipping of raggamuffin (ragga).

to go around untidy, uncombed, hair hanging down

to regret

(ragga till) to bristle

to search, look for, hit on, pick up (women, in cars)

to search, look for, recruit (sponsors, supporters, new members)

Source: wiktionary.org