The Collaborative International Dictionary
Limousine liberal \Li`mou*sine" lib`er*al\, n. a wealthy or well-to-do person of liberal political inclination. It is sometimes used as a term of contempt for those espousing the cause of poor people, without having to endure the discomfort that their policies may inflict on others, such as the lower middle class.
Wiktionary
n. (context US pejorative English) A wealthy person, liberal in politics, deemed insulated from any adverse consequences of the policies they support.
Wikipedia
Limousine liberal and latte liberal are pejorative American political terms used to illustrate perceived hypocrisy by a political liberal of upper class or upper middle class status; including calls for the use of mass transit while frequently using limousines or private jets, claiming environmental consciousness but driving fuel inefficient sports cars or SUVs, attacking income inequality while being wealthy themselves, or ostensibly supporting public education while actually sending their children to private schools.
"Limousine liberal" is also a reference to celebrities who use their fame to influence others into agreeing with their political and societal points of view. Such celebrities' critics (including proponents of the pejorative) assert that their wealth and status keeps them out of touch with the American middle and lower middle classes they purport to support, and that they are typically blind to this disconnect.
Usage examples of "limousine liberal".
It will enrage the American status quo, perhaps cost him congressional and presidential support and will earn him the enmity of his 'limousine liberal' supporters.