Based on the term "subussy", a "spongussy" is using Spongebob as a substitute for a pussy. Typically used by JimmyHere fans, this is a common phrase to throw into any conversation.
Michael: "Damn bro look at that spongussy"
Aiden: "I regret becoming friends with you"
its a Spongebob fleshlight
a guy walks into a toy store and asks
-Is there any spongussy here ?
-i'm calling the cops