From Wikipedia in Spanish:
Rompope
De Wikipedia, la enciclopedia libre
Licor de huevo. El rompope es un licor preparado con yemas de huevo de gallina, vainilla, canela, almendra molida, leche de vaca, azĂșcar y alcohol. Es de color amarillo y consistencia espesa.
http://es.wikipedia.org/wiki/RompopeTranslation:Liquor made from egg. The rompope is a liquor made with egg yolk, vainilla, cinamon, grounded almonds, milk, sugar and alcohol. It is yellow and thick.
Pd. The text below says it was originally made by some monks in Puebla, Mexico. It's a mexican liquor. I've never tried in my life.