Manolo Cabeza de Huevo

"Manolo Cabeza de Huevo" (Spanish for "Manolo the Egghead", although interpreted as "Manolo the Egg Head"), where "huevo" in some Latin American dialects colloquially stands for "glans" is a series of famous Spanish prank calls made by the New York radio show El Vacilón de la Mañana (Spanish for The Morning Party).

The original set consisted in three prank calls; in these, the presenter of the show (which itself is known for making prank calls of this nature), called a person named Manuel (original for Manolo), a superintendent of a New York City building. After calling Manuel, "Manolo Cabeza de Huevo", Manolo would react angrily and insult the caller. The prank calls were presented in the show and uploaded to the Internet.

The popularity of the prank calls was so high that El Vacilón eventually did more set of prank calls, which were again presented and uploaded. The prank calls sets were topics of discussion in many Internet blogs and forums; some users even elaborated Adobe Flash animations to depict Manolo's reaction to the calls. The sets have since become an Internet phenomenon, and have received a small cult following.