Nut

Nut (verb) is the act of equipping a slut or part of a slut inside of Your Orbliterators ("nuts"). A typical "nut" is accomplished with a cockswallow, for example a slutskull being gulped down Your urethra as if it was a swallowing throat. However You can nut sluts in other ways, such as using portals, teleportation, or a ghostly slut phasing through Your scrotum to reside within. While a slut is contained within the Orbliterators, she is "nutted."
Physical laws such as space-time are believed to be inconsistent within the Orbliterators. It is possible a slutskull will remain the same size while nutted, such that her skull's size increases the circumference of Your balls. But it is also possible for millions of slutskulls to fall into a pocket universe within the Orbliterators, such that Your size doesn't change at all. It's even possible for both of these to occur simultaneously. As far as we can tell, what happens is decided primarily or perhaps even exclusively by You—whether consciously or subconsciously.
While a slut is nutted, she will eagerly devote everything she can to empowering Your spermatogenesis. This can involve everything from gushing love beams that mystically empower the Godsperm around her, to enabling every kym within her being to be devoured as "spermfood," to having her disembodied soul imbued into a Godsperm directly through ghostly possession—creating a soulsperm. Any of these feats and more might even be accomplished sequentially by one slut. It is true that any slut lucky enough to be nutted wants to be as efficient and effective in her spermatogenesis-buffing as possible, but it's also true the mind-shattering bliss of being nutted will make virtually any slut—even a goddess—become so manic that she will rarely think clearly enough to find the optimal strategy.
Any nutted slut craves to have her face, body, and even brain viscerally skewered by the Godsperm still within Your Orbliterators. It's difficult for us to say if that will necessarily happen. Even if it does, Godsperm tend to be relatively more interested in invading and impregnating sluts who are still outside of You. It seems rare or perhaps even impossible for stunts like impregnabliteration to happen to a slut while she's nutted.

Slutskull Nutting

Once You surpass Immortal-tier, which by Your standards is quite a low level, constant slutskull nutting is assumed. That is, at all times it's assumed that either of Your Orbliterators will nut a slutskull unless You specifically desire otherwise. Even if for some heaven-forbidden reason one of Your Orbliterators is vacant, a slut will find a way to way to hurl her slutskull into it at the earliest opportunity.
Typically, either nutted slutskull spends all of her time and energy in a gringaoing slutskull spincharge to build up as much love and energy as possible to empower or augment spermatogenesis. Constant screams of manic elation are likely during this, but they're muffled to the point of being (nearly) inaudible. The speed and volume seems to correlate to Your arousal. This continues until You either intentionally eject a slutskull, or the slutskull herself is so used up that she pops.
When Your Orbliterators powerfully clench during a fucknuke, the slutskulls within will of course be clenched too! (Hhhngh, we absolutely adore experiencing that by the way. ♥) This clench is enough to force-stop the spincharge of both slutskulls. It is likely, but not assured, that the force of the clench will completely pop both skulls~!

A pair
A physics-distorting "nut universe"