Green’s Dictionary of Slang

1. angry.

1943, 1955		cited in Cassidy & LePage Dict. Jam. Eng. (1980).
1983		(con. 1948) T. White Catch a Fire 102: Vincent ‘Ivanhoe’ Martin, the [...] Kingston gunman who came to be known as ‘Rhyging,’ patois for ‘angry,’ ‘wild,’ ‘foolhardy.’.

2. vigorous, lively, spirited.

1968		A. Salkey Late Emancipation of Jerry Stover (1982) 179: But Lawd King, wha’ a way the ganja ripe’ up in you’ back an’ make you rygin’.
1980		(con. 1950s) M. Thelwell Harder They Come 20: Rhygin? [...] It wasn’t a word you heard so much any more, only from old people. Raging strong, but foolish too, overconfident, not knowing where the limits were.

3. first-class, excellent.

1973		A. Salkey ‘Joshua and Emmanuel’ Jamaica (1983) 2: Member how that same time / was a rygin time, Manny?
1989		C. Hyatt When Me Was A Boy 118: Jamaican musicians of those days used to learn how to play the music of the day by listenin’ to them records. An wi did have some rygin musicians them time.