Hi yeo, welcome to the madhouse!


I’d say that’s from the UK, more probably. Gob is a word with many meanings, but the commonest is a crude or colloquial reference to the mouth – and its documented use in the OED predates the settlement of Minnesota or Iowa:

north. dial. and slang.
a. The mouth.
1550 Christis Kirke Gr. xx, Quhair thair gobbis wer ungeird, Thay gat upon the gammis.

There are plenty of gob~ words and phrases in regular use here, including gobsmacking to mean something like ‘truly amazing’, although interestingly the OED has nothing for either this form or in a hyphenated version. Guess it’s too new and irreverent to have found its way into widespread print yet!