tarpaulin
noun /tɑːˈpɔːlɪn/
  /tɑːrˈpɔːlɪn/
(also North American English, informal tarp)
 [countable, uncountable]- a large sheet made of heavy waterproof material, used to cover things with and to keep rain off- The car was covered with a black tarpaulin.
 Word Originearly 17th cent.: probably from tar + the noun pall + -ing.