mash          
 verb [ T ] uk/mæʃ/ us/mæʃ/
 将(食物)捣成泥状,把(食物)捣烂
to crush food, usually after cooking it, so that it forms a soft mass
  Mash the potatoes and then mix in the butter and herbs. 将土豆捣成泥,然后拌入黄油和香草。 
  mainly US informal严重损毁 
to violently crush part of a body or an object
  His face was badly mashed up in the accident. 他的脸在事故中严重受伤变形。 
 Phrasal verb   
mash up something 捣碎,压碎(尤指食物)
to crush something, especially food
  He always mashes up his peas before he eats them. 他总是先将豌豆捣碎然后再吃。 
 mash       
noun [ U ] UK informal uk/mæʃ/ us/mæʃ/
 土豆泥(同 mashed potatoes)
→  mashed potatoes 
  sausage and mash 香肠和土豆泥