term used to describe when you and your buddy are both on the samewavelength in terms of sillyness and you begin finagling, which may be followed by a spoingus.
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"