After a radical change of belief (religion, political view etc.) people sometimes start to indulge in a thing which is a strict no-no by their previously held belief system. For example after leaving their religion one may start indulging in something considered a taboo food by their previous religion. Is there a phrase or idiom/proverb to describe this type of behaviour?
to do something as much as possible because you were not able to do it before:
After seven years in prison, he’s home with his kids and making up for lost time.
that was cambridge or from dictionary.com
make up for lost time verb phrase
To work, play, travel, etc, very fast to compensate for a slow start
This phrase is frequently used in a slightly ironic way for the purposes you suggest ... In fact it feels like it usually means what you suggest.
In a way, they are overcompensating.
: excessive compensation; specifically : excessive reaction to a feeling of inferiority, guilt, or inadequacy leading to an exaggerated attempt to overcome the feeling
- overcompensate verb
A combination of phrases is called for here because there are five distinct elements that your question encompasses:
indulge / previously / prohibited / change / belief.
Each of these elements can be accommodated with these:
(indulge) (enthusiastically) embrace ... throw oneself into ... abandon oneself to ... fervor
(previously & change) new-found
(prohibited) license ... fervor ... allow
(change & belief) convert ... fervor
To retain your full meaning, I prefer to keep the word indulge, as in this example:
The new-found license to indulge allowed her to throw herself into sex with the fervor of a convert.
Of course there are many possible combinations, but I think this example shows one way in which all the elements you specify can be addressed.
This is probably a mash-up of idiomatic expressions, but how about:
-both definitions from Mirriam Webster on-line.
I cannot believe that anyone is actually able to escape the guilt of such an indulgence with a sudden change in idealogy: there will always be an imp riding on the shoulder.