A hyperphallic structure is one that:
I could offer a more detailed and relevant explanation. hyperphallic ep1 umbrelloid link
Putting it together: In a (e.g., SCP Foundation, Control video game, Annihilation by Jeff VanderMeer, or a TTRPG scenario), this might describe a biological or alien artifact: a phallic, segmented (ep1) structure that connects to an umbrella-shaped organism or apparatus. A hyperphallic structure is one that: I could
Based on the terminology used in your query, here are a few likely possibilities for what this might be: Underground/Experimental Music: Control video game