1. Subconsciously committal bond between two people who are soulfully entangled to each other.
2. Not a Relationship, not a Situationship.
Imani: Are y'all dating yet?
Malcolm Not really, we in a lil soul sitch.
An attempt/action of having sexual relations with their friend's significant other behind their back.
Steve: "did you hear bob is dirty tapping logan's girlfriend?"
Adam: "no, I'd never think of him to do such a thing"