la puta que te pario
The whore that gave birth to you
This is a strong insult. "Puta" of course is a bad word for prostitute. "Parir" means to give birth, but in Latin America is used primarily for animals. To say that about a person is vulgar. This phrase can be used in a number of situations, almost like a "your mama" joke in English, but the mostly common is "andata a la puta que te pario".