Green’s Dictionary of Slang

mushy adj.2

also moosh
[Zulu mu + hle, good for one; orig. Zimbabwean use]

(S.Afr.) nice, pleasant.

Weekend Argus 24 Feb. 2: Of course he was also giving her one of those stupid rings [...] but he knew the real ‘moosh’ present was this lovely knife [DSAE].
Chronicle (Zimbabwe) 14 Oct. 1: If the words are appropriate and sound jolly, they give one’s language a bit of colour which is not out of place. But over-used when everything, for instance, is ‘moosh’ it is wrong [DSAE].
J. Carruthers in Style May 38: Anyone at a when-we reunion who doesn’t know what ‘mushy’ means must be Zambian [DSAE].