The word means "eggs," but the reference to "balls" is so strong that you have to watch out using the word at all. Polite girls would probably order blanquillos (little white things) from a male waiter.

Based on context, could either mean "testicles" or, eggs. However, people tend to be unclear with this at times...

testicles, balls, nuts, etc. in spanish

Eggs in Spanish, but commonly used to describe testicles.

Code name for Beer Pong

Man's family jewels
word is spanish (was referring to chicken eggs)but over time changed to a male's nuttz. Huevos is as destructive as Cojones (dick + nuttz)
a more gentle version is Pelota(ball)

Balls, testicals, the "lower regions", the love clangkers, etc.