1 a floor-mat of shaggy material or thick pile.
2 a thick woollen coverlet or wrap.
Phrases and idioms:
pull the rug from under deprive of support; weaken, unsettle.
Etymology: prob. f. Scand.: cf. Norw. dial. rugga coverlet, Sw. rugg ruffled hair: rel. to RAG(1)
Useful english dictionary. 2012.