點解Yahoo字典查唔到Mcjob依個字?

不對.

wikipedia有
http://en.wikipedia.org/wiki/Mcjob
oxford dictionary有

只是yahoo字典太少字

I agree with Ming.

First this word is not new, it's been out for more than 17 years. Yahoo dictionary is not a formal dictionary, it doesn't even state on which version of dictionary it is based on.

Mcjob appears in major dictionaries: American Heritage, Oxford, and Merriam Webster.

Mcjob唔係一個正式英文字，佢只不過係為一個近年來的社會風氣而發展出來的一個字．情況就好像中文入面果D詞語咁，咩叫"零理", "雙失"... 中文字典都無啦... 不過你一講出來就個個都明

或者十年八年後mcjob就會在字典中出現都唔定