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1.
Sud-American word used as an insult. The literal translation is : "Your mother's sea shell".

This word makes direct reference to the female reproductive organs and it is considered one of the biggest insults in countries like : Chile, Argentina, Peru and Bolivia.

English alike : Motherfucker.

"¡Déjate de gueviar concha de tu madre!"

Translation : "Fuck off you motherfucker!"
by Alfacentauro January 16, 2007
 
2.
In Chile, meaning proced gestation of human in to the mother's body.
Andate a la conchadetumadre
(Go to mother's pussy!)

In Chile use: conchetumare
by Mor&Mor January 29, 2008