I fully understand why describing a character of an unclear ethnic background as "ambiguously brown" is Not Good, but I started thinking about how the more you narrow it down, the funnier it gets to describe a character as "ambiguously" something.

"Ambiguously brown" - frankly that's just lazy, that could be anywhere. Just say "brown" if you really have to.

"Ambiguously African" - okay you have a vague guess of a continent

"Ambiguously Central Asian" - plausible to narrow down on sight if you're very familiar with people from around this region

"Ambiguously Baltic" - this mf is either Latvian or Lithuanian, and I am intrigued by the fact that your estimate is this precise but you still aren't confident enough in your assessment to guess which one

"Ambiguously Grevenan" - if you can tell greeks apart that closely, then frankly you're just flexing at this point

writer: "he was ambiguously American"

reader: "so wait, was he white? black? hispanic? Samoan?"

writer: "in the low light and dense fog, it was impossible to make out, but he was definitely eating a burger."