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Someone who is slow and retarded.
That guy Gregg is a fucking Slowtard.
by Thimble October 20, 2003
The person in the car ahead of you who is driving retardedly slow.
I would have been here earlier, but the slow-tard in front of me insisted on driving 15 mph the whole way.
by josh20mn February 23, 2011
Someone who is very slow in the head, but is not quite a retard.
Wendy has blonde hair, she must be a slowtard.
by GoBananazz February 05, 2010