Circle of Digression 

Imaginary circle one steps or moves into when going off on a tangent during lively intellectual conversation.

They were having a rollicking discussion when he suddenly veered off topic. This was made all the more obvious by scooting his chair over just a tish (titch, skosh, trifle) and announcing that he was now inside the Circle of Digression.

Circle of Digression by mcveym+mitchellc May 2, 2011

Circle of Digression 

Imaginary circle one steps into when going off on a tangent during lively intellectual conversation.

They were having a rollicking discussion when he suddenly veered off topic. He made this all the more obvious by scooting his chair over just a titch and announcing that he was stepping into The Circle of Digression.

Sometimes referred to by insiders as the COD.

Circle of Digression by mcveym+mitchellc May 2, 2011