Kangaroo's
Watching "have I got news for you" last night and heard the funniest thing: -
On discovering Australia, Cpt Cook started to explore with the help of an aborigine man. On seeing a kangaroo Cook said, "what's that?" and the aborigine replied, "kangaroo". And so the creature was named.
However the aboriginal word "kangaroo" roughly translates as "I don't know"!!!! Don't know how true that is but it definitely should be.