plimsoll
noun /ˈplɪmsəl/,  /ˈplɪmsəʊl/
  /ˈplɪmsəl/,  /ˈplɪmsəʊl/
 (also pump)
 (also old-fashioned gym shoe)
 (all British English)- a light simple sports shoe made of canvas (= strong cotton cloth) with a rubber sole- a pair of plimsolls
 Word Originlate 19th cent.: probably from the resemblance of the side of the sole to a Plimsoll line.