- (British English)
a piece of clothing for the upper part of the body, made of wool or cotton, with long sleeves (= arms) and no buttons （毛或棉的）针织套衫 
a woolly jumper 套头毛衣
Oxford Collocations Dictionaryadjective- baggy
- loose
- sloppy
- …
- pull on
- knit
- make
- …
- (North American English) (also pinafore, pinafore dress (especially in British English))
a loose dress without sleeves (= arms), usually worn over a blouse or sweater 套头衫： 宽松的衣服，没有袖子，通常穿着上衣或毛衣 a person, an animal or an insect that jumps 跳跃者；跳跃动物；跳虫
Word Originsenses 1 to 2 mid 19th cent. (originally meaning a loose jacket worn by sailors): probably from dialect jump ‘short coat’, perhaps from Scots jupe ‘a man's ’(later also a woman's) ‘loose jacket or tunic’, via Old French from Arabic jubba. Compare with jibba.