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1. A historic mammal, generally 5'6'' 3/4 usually of Dutch decent, but also found to have genetic roots in the southern parts of America. From the latin, Slothiniusmamasaurius. Prounounced "sloth""A""saurus".

2. Also a term used to describe a person who would rather sit alone in a laundry room and stare at a wall instead of interacting with humans or animals.
1. Eg. The slothasaurus was first discovered on the grounds of Iowa's Dordt College.

2. Eg. Man, Danny was being such a slothasaurus at the barn party last night!
by supercoolkid37 January 01, 2010
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