Definitions by EskimoBobGuy

TF 

n. Short for "testicular fortitude", meaning balls, or ballsy.

"Hey man, tf!" - "Hey man, ballsy!"
"That takes tf, dude." - "That takes balls, dude"

TF by EskimoBobGuy June 10, 2004

testicular fortitude 

n. Balls; Ballsy.
More commonly used in its abbreviated form, tf.

"Hey man, tf!"

testicular fortitude by EskimoBobGuy June 10, 2004