Slang for "'the fuck"

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

The Fuck? But with a sassy sort of undertone.

The Fuck. Most commonly used as a shortened WTF. However, TF is used in instances when WTF takes too long to be said. TF is also used in a more exclamatory sort of phrasing.

The Fuck? sortof a short version of WTF (What The Fuck) only it sounds cooler

Allthough it usually means "The fuck" ( shortened version of WTF ), It can be used as an abbreviation for the game Team Fortress 2, or used as an abbreviation for the fetish Transformation

Tf simply means The Fuck. Short for WTF