[Oztrich Boy]

In Australian usage anyone whose name is prefixed "Mac" is referred to as "Macca"

In practice the most common use is referring to the purveyors of a meat flavoured substance sold contained in a bread bun.

Given his dietary preference, I can see Sir Paul being uncomfortable with the association.

What girlyman Jacobs's problem is I have no idea.

[Tax-chick]

Fascinating. Thank you so much for clearing that up!