a stumblebum
可数名词，前加不定冠词。
He was just a stumblebum in the ring.
他在拳击场上只是个二流拳手。
二流职业拳击手
笨拙的人；笨手笨脚的人。；笨拙的职业拳击手；笨手笨脚的人；无能力的人；街头流浪汉
a second-rate prize fighter
笨拙的人；笨手笨脚的人。
A blundering or awkward person.
笨拙的职业拳击手
An inept prizefighter.
The young stumblebum lost his first three fights by knockout.
这个年轻的二流职业拳击手前三次比赛都被击倒而输掉。
用法提示：stumblebum 在此作名词，指二流职业拳击手。
Even as a stumblebum, he hoped to train hard and become a champion.
即使只是个二流职业拳击手，他也希望努力训练，成为冠军。
用法提示：stumblebum 作名词，表示水平低下的职业拳手。
The local gym was full of stumblebums who would fight anyone for fifty dollars.
当地健身房满是二流职业拳击手，为了五十美元他们愿意跟任何人打。
用法提示：stumblebums 是复数形式，作名词，指一群二流职业拳击手。
可数名词，前加不定冠词。
He was just a stumblebum in the ring.
他在拳击场上只是个二流拳手。
形容词可修饰，如 old stumblebum 指街头流浪汉。
The old stumblebum wandered the streets.
那个老流浪汉在街上游荡。
用于贬义称呼。
Don't call him a stumblebum just because he's clumsy.
别因为他笨手笨脚就叫他笨蛋。
比喻笨拙的举止。
She acted like a stumblebum and dropped everything.
她动作笨拙，什么都拿不稳。
grammar · medium
易错句子He is very stumblebum.
正确表达He is a stumblebum.
'stumblebum' 是名词，不能受程度副词 'very' 修饰。正确用法是直接作主语补足语（表语），前面需要不定冠词 'a'。
grammar · medium
易错句子He stumblebummed in the ring.
正确表达He was a stumblebum in the ring.
'stumblebum' 是名词，不能加 '-ed' 当作动词用。正确用法是作为名词与系动词 'was' 构成谓语，并加不定冠词 'a'。
stumble是动词，意为绊倒；stumblebum是名词，指笨手笨脚的人或二流拳击手，两者在动作与结果上相关，但词性和核心含义不同。
bum指流浪汉或酒鬼，与stumblebum的“街头流浪汉”含义重叠，但stumblebum还有“笨手笨脚的人”或“二流拳击手”的含义，而bum没有；此外bum还有其他常见含义如“屁股”。
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