fuck-tune 

To detune a friends guitar to play a certain song but then not tune it back.

"Dude, i went to play my guitar last night only to find that Jeff changed every string to D. He totally fuck-tuned my guitar! How am i supposed to play this shit?"

fuck-tune by bassheads April 2, 2008

Tune-Fuck 

The act of tuning the strings of a guitar so tight or so low that it's not only an annoyance for the guitarist to tune back and/or may cause the strings to be damaged

Well man, you stole his drum gells, so I Tune-Fucked your guitar to get back at your for it

Tune-Fuck by Pale Horseman May 7, 2015

Fucktune 

Noun.
A song that makes the listener want to do the do. Alternatively, a song to get dirty while listening to.

"At first he wasn't feeling it, but then I put on Passenger by Deftones and he was ready to get down. It's definitely my go-to fucktune."

"I have a playlist of fucktunes all set to go for when I bring a lady back to my place."

Fucktune by libelicious November 3, 2014