Green’s Dictionary of Slang

aich phr.

(US campus) a version of a-ight phr., denoting more muted approval.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) [Internet] Aich (eye-ch) (int.) It is a sort of universal expression which can be used to denote approval, though not in very definite terms. When you don’t wanna praise something, but haveta give it some credit, you say ‘aich’ with apparent interest. [Bishop Cotton Boys’ School, Bangalore, India].