That is one spot for me that is very hard to get BBS. My whiskers there lay very flat and are very tough, and is one spot that absolutely requires ATG to get smooth.

I start with the basic WTG pass, relather and then it's ATG. I stretch the skin over my teeth or "puff" it out with my tongue. I generally use the heel of the blade (the most inflexible part of the blade) and will scythe ATG as well. This works extremely well.

BTW, in lieu of a technical term for this area you could say the "soul patch area" and I'm sure most of us would know what you're talking about