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1.
Someone who achieves a feat of skill through nothing but luck
You landed that 3-pointer?! What a tin ass!
by tin ass September 10, 2003

Words related to tin ass

tim ass tin as tinass tin azz
 
2.
Do have been shagged by so many sheep that your behind begins to take on a dark shade of grey resembling tin.
Man: That tokoroan lad is a bit of a tin ass.
by Tui_Pure3 July 16, 2011