yarn bomber
noun/ˈjɑːn bɒmə(r)/
/ˈjɑːrn bɑːmər/
(also yarn stormer
/ˈjɑːn stɔːmə(r)/
/ˈjɑːrn stɔːrmər/
)- a person who decorates items in the streets with colourful pieces of knitting or other items made using wool, cotton, etc., often doing it secretly
纱线轰炸机：经常在街上偷偷用彩色的针织物或其他用羊毛，棉花等制成的物品装饰物品的人