macspurt

Noun; an excitable individual, keen and knowledgable about Macintosh devices, so much so that self control can be lost. Often mis-spelt as Macspert.
Also

Noun
A sticky deposit found on a Macintosh device, left by a Macspert

Bill's new ipone was a tad slippery in his hands with macspurt all over it, after his mate Dave (anothermacspert) showed him how to put it on vibrate mode.