Theories about the true nature and/or identity of goopgoop varied wildly. At different points it was suggested theat goop was truly:
- Andy Kaufman
- Gywenth Paltrow
- Riley Soloner
- Tupac Shakur
- God
- An Angel
- An AI
- Matthew Perry
- An ALF (Alien Life Form)
- Gordon Shumway
- JD Amato
- Someone from Fusion
- Emma Noble
On March 31st, YardInfant asked GoopGoop their preferred pronouns. GoopGoop responded by playing the music video for Eminem's "The Way I Am," muting everything but the line "I am whatever you say I am."