Muslamai is the word used by Onkelos in his Targumim to refer to Meshulamim i.e. the children of noah. There are two main categories of Muslamai:

Chokhmei Umot HaOlam who do not believe in Judaism

Hasidei Umot HaOlam who subscribe to a system of belief in Judaism which was established by the Chazal when the Jubilee was in effect (i.e. before 135CE).