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When you are pursuing a member of the opposite sex.
Hey did you see Royal and Morgan?
Tin Cup?!?
Yep! Tiiiiiinnnn Cuuuuup!
by kernelcornyjoker August 30, 2011
In sports; to go for and miss a single extremely difficult play or shot repeatedly and stubbornly, thereby ruining any chance of success in the overall game.
"Dude, you were winning up till that 10 on the par five. What happened?"
"I totally tin cupped it man."

"Did you see Joe tin cup that basketball game?"
"Yeah man, he had the wide open lay up but just had to go for the three."
by mrbojangals May 28, 2010
the worst damn movie in the world
i hate tin cup

it sux
by screwster May 10, 2005