masculine noun
1. (anatomy) 
a. anus 
El médico notó dos hemorroides en el sieso del paciente.The doctor saw two hemorrhoids in the patient's anus.
2. (surly person) (Spain) 
Marcos es un sieso. No le habló a nadie en la fiesta.Marcos is an unfriendly person. He didn't speak with anybody at the party.
3. (surly) (Spain) 
¡Eres sieso! Intenta ser un poco más sociable.You're unfriendly! Try to be a bit more sociable.
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