The state of an online forum thread which has been locked by an administratior or moderator on the basis that the subject matter is too trivial to warrant further discussion. Typically a concluding post is made by the moderator to the effect that the discussion to date has made a "mountain out of a molehill" before the thread is locked for further discussion. Threads tending towards criticism of the moderator's organisation may sometimes be pre-emptively molehilled to avoid further negativity to propagate.
Poster1: Hey, respond to my post about Germaine Greer's new book!
Poster2: I can't. It's been molehilled.
A mole is a unit of measurement used to express amounts of a chemical substance, defined as an amount of a substance that contains as many elementary entities. In essence it relates to something large.
A piece can have multiple meanings from just being used an abbreviation/short name for something e.g. you piece of shit! to anything more generalised e.g. nice piece!
The term Molepiece brings these two majestic meanings together allowing the instigator of said word full artistic license over it's meaning. It can be used most commonly in the workplace to avoid finding oneself in an angry boss situation or inevitable HR incident.
1. You are such a molepiece
2. My boss is a molepiece
3. Suck my molepiece
4. Complete molepiece