non-core promise 

An election promise that you have gone back on after the election is over. It is important not to define what promises are core and what are non-core before the election itself.

After winning the 1996 Australian Federal election John Howard slashed spending on Education, Health, Social Welfare blaming a budget deficit left by the previous government. When it was pointed out that he had promised not to cut spending on these areas as part of his election platform and that he had lied, he claimed that these were "non-core promises"

non-core promise by Ormas October 19, 2005

non-core promise 

A commitment to deliver (a service, funding, an item) that is subsequently set aside. The broken promise is then explained with the glib expression "oh, but that promise was non-core".

Now generalised to non-political situations, too.

Origin: Australian federal elections at the turn of the 20th/21st centuries. The conservative party (known as the Liberal/National coalition) made a number of election promises which were broken soon after the election. The prime minister, John Howard, attempted to explain this behaviour by claiming that some promises are "core" and some are "non-core" and thus, don't count.

Not only did "No tax increases, no new taxes" turn out to be a non-core promise, but in the campaign, Howard had also given a solemn undertaking that "I'm not going to break any promises". That one was certainly non-core.

Laurie Oakes (Australian political reporter/writer)
Excerpt from National Nine News (network TV) 12 May 2005
as quoted at news.ninemsn.com.au

non-core promise by Kerwyn October 26, 2005

Noncore 

When a band doesn't waste your time by going off stage to come back on again a few minutes later for an encore.

"The Stone Roses were great. They played for nearly two hours and didn't prat about with a noncore"

Noncore by Minor Threat 27 June 11, 2019

Noncore 

1) Non pornographic material that is used in erotic context.
2) Pretending to have sex / dry humping.

1) John is a porn addict who wants to overcome his addiction, so he masturbates over noncore porn, usually a blank computer screen.
2) I wanted to impress my friends at a house party by seducing a hot chick, so I locked myself into a room with her and we had noncore sex while my friends listened behind the door.

Noncore by Cherryman3 November 19, 2016

Noncore 

In terms of musical and fashion style, the antithesis of hardcore. To be noncore one must embody everything that is not hardcore.

Noncore people never exclusivly wear torn jeans and black band t-shirts that are too small. A male example of noncore would never wear womens jeans, as opposed to current fashion trend.

Noncore by Jem0771 September 7, 2006