Deep

1. A description of stack size in relation to the size of the blinds.

Shit is Deep

There is no singular measure of "depth" in poker, and it is usually meant as a relative descriptive term, like "Sure, the buyin for the Commerce $10/20 game is only $600, but it usally plays really deep.

Generally speaking, games of big bet poker are considered deep-stacked when players have 100BBs or more each.