1. automatic guilt experienced in almost any situation, because of one's having been raised catholic, jewish, or some other culturally dictatorial upbringing.
2. guilt resulting from the frequent use of a friend's car.
(Note that these two meanings can coincide, namely in that the person afflicted with autoguilt type #1 will almost inevitably experience autoguilt type #2.)
1. "Being Catholic sucks: my default autoguilt setting must be around 8, whereas yours seems to be set at 0 -- no matter what shit you pull."
2. "Dude, I hate to ask, because I'm experiencing serious autoguilt, but I need to borrow your car again this weekend -- cool?"