High Quality Content by WIKIPEDIA articles! Parasite single ( , parasaito shinguru) is a Japanese term for a single person who lives with their parents until their late twenties or early thirties in order to enjoy a carefree and comfortable life. In English, the expression "sponge" or "basement dweller" may sometimes be used. The expression is mainly used in reference to Japanese society, but similar phenomena can also be found in other countries worldwide. In Italy, 30-something singles still relying on their mothers are joked about, being called Bamboccioni (literally: grown-up babies) and in Germany they are known as Nesthocker (German for an altricial bird), who are still living at Hotel Mama. Such behaviour is highly encouraged in Singapore. Living with parents is considered a cultural expectation, while living on one's own (sometimes even if one is married with children) is perceived as an act of insolence.