"That's not my job."
"It's not my problem."
"It's not my fault."
"I can only do one thing at a time."
"I am way overqualified for this job."
"This job is easy! Anyone could do it!"
"It can't be done."
http://finance.yahoo.com/news/7-Things-Never-to-Say-to-Your-usnews-226352592.html?x=0