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1.
To play guitar fast with technical skill, but no feeling
Anything by Yngwie Malmsteen
by Billie Joe Armstrong August 11, 2003
 
2.
(v)"To play the air guitar."

(Taken from the movement of the left hand up and down the imaginary frets of a non-existent electric guitar)
"You can always recognize the spotty teenage Status Quo herberts, by their inability to refrain from 'fretwanking' the second "Caroline" is played on the juke-box."

by Stan Grytviken April 01, 2003