A man's testicles when they are ready filled with cum that is about to be squirted all over the woman he's bumping uglies with.
(originally means "salted hard-boiled eggs" in Spanish but I bastardized the word into something dirty.;-) )
Oye mamacita que ya pares tu gemido! Yo ya te tengo unos huevitos salados preparados especialmente para ti!
(Translation: Hey baby you can now stop your moaning! I now have some "salted eggs" prepared just for you!)