One who is not physically homeless but demonstrates transient/homeless characteristics.

Such as:

Random outburst ignited by just about anything.

Mood swings that start off with smiles and end up with anger tantrums or vice versa.

Philosophical moments of which he/she feels they have reached enlightment and therefor can give life advice in a condescending manner.

When you eat dirt for the first time and leave your family to build a shack in the woods