maga, adj. — Green’s Dictionary of Slang

maga adj.

also marga

[SE meagre or Fr. maigre, thin]

1. (W.I., Rasta) thin.

2004

Skinnyman ‘That’s What I’m Gonna Do’ 🎵 Looking frail and marga.

2. (UK black) in fig. use, in poverty.

2004

K-Lash-Nek-Off ‘Jankrowville’ 🎵 This one is dedicated to my peeps living maga.

3. (UK drugs) to be intoxicated by cannabis [play on lean adj. (1)].

2015

67 ‘Dead Up’ 🎵 I smoke one then I'm smoking karma / I’m marger.

maga dog (n.)

(W.I., Rasta) a mongrel; thus as a term of abuse.

1976

‘In The Melting Pot’ in P. Ashton et al. Our Lives (1982) 177: Who tell you that me love that maga dog? Me no care two shits about him.