hipto Not in the dark about Aware of, informally Aware of, to cool cats Aware of, in '60s slang Knowledgeable about, old-school Huey Lewis and the News tune, "___ Be Square" Digging, in a sense Aware of, so to speak Aware of, "Right on" "___ Be Square" (Huey Lewis and the News) In on, slangily Aware of, slangily Knowing what's what about Savvy about In the know about Informed about Familiar with Clued in about Well aware of