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

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 Fucking 

1.) The act of having sex to the beat of a song
2.) Using a CD, microphone, guitar, or drumstick as a dildo

Xavier - "Yo I tune fucked Lisa last night"
Chris - "Really, nice to what song?"
Xavier - "Jingle Bells"
Chris - "....."
Xavier - "Yeah dude tune fucking is awesome"
Chris - "I'm going to go shove a horse up my ass"

Tune Fucking by DINKLEBERRY DAN December 13, 2010