"Guilt trip - the one holiday no one wants to take." - me, April 13th 2000
A guilt trip is where you crucify
yourself over something like breaking a promise
to yourself or someone. In most cases it's where you've hurt
someone who you care
about (wouldn't matter
to you otherwise).
Guilt trips can be induced by other people (usually referred to Bastards for doing so).
See also: cheating, infidelity, breaking a promise