T-zone 

From iVillage beauty: "The T-zone is the part of your face consisting of the forehead, nose and the area around your mouth, including the chin. It is so named because it's shaped like the letter 'T'."

Oil tends to build up in the t-zone, so it's particularly important to exfoliate.

T-zone by Glacial Spain July 29, 2008

Don't enter the exclusion zone 

A warning not to talk about a subject any further.

Q: You over the break up ? A: Don't enter the exclusion zone!

Don't enter the exclusion zone by Liberation Theology November 10, 2019