When one "derps" in the middle of a ship, while having feels for both characters. The level of shipderping is made more intense when one ships the couple in which they are shipderping.
Michelle: I'm really "Shipderping" right now...
Rachel: What ship?
Michelle: It's wincest. I definitely don't ship it, but I get so many Sam feels and Dean feels, it's ridiculous.
Rachel: You think you have it bad? I'm Shipderping Destiel.
Michelle: Oh wow. That's intense.