lummox       
noun [ C ]  informal uk/ˈlʌm.əks/ us/ˈlʌm.əks/
 笨蛋
a stupid or awkward person
  Be careful, you big lummox, you just stamped on my foot! 小心点儿,你这个大笨蛋,你刚好踩到我的脚上了! 
 Synonyms: clod (PERSON) goon (SILLY PERSON) lug (PERSON) lump oaf