GotTahMahTyKnows

Another way of saying "God Almighty Knows." Mostly used in the south, often heard in African American communities. This word is often used in anger, shock, or when you're fed up of some annoyance and or some body. The word itself can be one sentence by itself.

Ruby if you don't stop tapping on the table like that, gottahmahtyknows what I'll do!

Mom, Miss Theresa next door died! Gottahmahtyknows!