testicular fortitude

n. Balls; Ballsy.
More commonly used in its abbreviated form, tf.
"Hey man, tf!"
by EskimoBobGuy June 10, 2004
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TF

n. Short for "testicular fortitude", meaning balls, or ballsy.
"Hey man, tf!" - "Hey man, ballsy!"
"That takes tf, dude." - "That takes balls, dude"
by EskimoBobGuy June 10, 2004
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