Green’s Dictionary of Slang

(US) oddly, out of kilter, stupidly, incomprehensibly.

1922		T. Thursday ‘Art for Artie’ in Argosy All-Story 30 Dec. 🌐 He looks at me kind of goofy.
1957		H. Simmons Corner Boy 150: I may not [...] talk all goofy like a professor or something.
1972		D. Jenkins Semi-Tough 253: The kick was a sorry one and scooted along on the ground, bouncing sort of goofy.