I. noun
also roys·ter ˈrȯistə(r)
( -s )
Etymology: probably from Middle French rustre boor, lout, alteration of ruste, from ruste, adjective, rude, rough, from Latin rusticus rustic, rural — more at rustic
archaic : roisterer
II. intransitive verb
or royster “
( roistered or roystered ; roistered or roystered ; roistering or roystering -t(ə)riŋ ; roisters or roysters )
: to have a noisy disorderly good time especially under the influence of alcohol : carouse , revel
had gambled and roistered and drunk until he dropped in his tracks — Donn Byrne