Wikipedia:

Yes Man

Summary:

may refer to: Assistant, also called Yes Man | Yes Man, a fictional character of Kappa Mikey | Yes Man (film), a 2008 American comedy film | The Yes Men (film), a 2003 documentary film | The Yes Men Fix the World, a 2009 documentary | "Yes Man" ...  (43 of 112 words, 7 senses)

Link:

http://en.wikipedia.org/wiki/Yes Man  [cite]

Wiktionary:

yes man | yes men [plural] | yes-man | brownnoser | Uriah Heep | yes-men [plural]

Summary:

[idiomatic] A person who always agrees with his employer or superior.  (11 of 81 words)

Link:

http://en.wiktionary.org/wiki/yes man  [cite]

Merriam-Webster:

yes-man

Summary:

a person who agrees with everything that is said | one who endorses or supports without criticism every opinion or proposal of an associate or ...  (24 of 36 words, 2 senses, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/yes-man  [cite]

Encarta:

yes man | yes men [plural] | yes-man: yes-men [plural] | yes-men [plural] | yes-man

Summary:

somebody, especially a man, who enthusiastically and uncritically agrees with the ideas and views of a superior  (17 of 34 words)

Link:

http://encarta.msn.com/dictionary 1861706978/definition.html  [cite]

Random House:

yes-man | yes-men [plural]

Summary:

a person who, regardless of actual attitude, always expresses agreement with his or her supervisor, superior, etc.; sycophant.  (18 of 25 words, pronunciation)

Link:

http://dictionary.infoplease.com/yes-man  [cite]