A seemly normal person that is actually retarded. Usually seems normal until they start to talk, they you realize they are actually Rosstarded.

Often hard to tell apart from normal people, but if you hang around them long enough you can see there is something wrong with them.
That guy seemed so normal till he started responded to questions in all random movie quotes, none of it made sense. I think he is a RossTard.
by mrp123 July 6, 2009
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Some one who is so bad at squash you may think that person is retarded
by randomrick June 24, 2011
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When you screenshot a meme on instagram but are so bad at memes that you refuse to crop it.
You're Rosstarded.
by Dahou January 4, 2020
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