pousse-café

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A drink consisting of several liqueurs of different densities, poured to form differently colored layers.
• noun A brandy or liqueur served after dinner with coffee.

from The Century Dictionary.

• noun A drink served after coffee at dinner, composed of several cordials (generally two parts of maraschino and one each of chartreuse, absinthe, vermouth, and benedictine, with a film of brandy), forming successive layers in the glass. The name is often given to any cordial taken after coffee.

from the GNU version of the Collaborative International Dictionary of English.

• noun A drink served after coffee at dinner, usually one of several liqueurs, or cordials, of different specific gravities poured so as to remain separate in layers; hence, such a drink of cordials served at any time.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun small drink served after dinner (especially several liqueurs poured carefully so as to remain in separate layers)