What is the meaning of Musse?

hiding place; cache

first-person singular imperfect subjunctive of mouvoir

inflection of musser:

1. first/third-person singular present indicative/subjunctive
2. second-person singular imperative

first/third-person singular present indicative/subjunctive

second-person singular imperative

mousse (a type of aired pudding)

a Muslim

Source: wiktionary.org