rug

Concise Oxford English Dictionary © 2008 Oxford University Press:
rug/rʌɡ/

▶noun

• 1 a small carpet.

  ■ Brit. a thick woollen blanket.

• 2 informal, chiefly N. Amer. a toupee or wig.

– phrases
pull the rug out from under abruptly expose or withdraw support from.

– origin C16 (denoting a type of coarse woollen cloth): prob. of Scand. origin; rel. to rag1.