Rapper AP.9 -- I'm Not Afraid of Ice-T ... and I May Have Banged His Wife

Ice-T's gonna be pissed ... 'cause rapper AP.9 is now strongly insinuating that he's banging T's wife Coco.

Of course, T already blasted his wife on Twitter after pics surfaced featuring Coco and AP.9 gettin' all kissy kissy during a night out in Vegas. T said the pics were "disrespectful and in bad taste."

Coco said the pics were harmless ... and stated that she's "happily married."

But this weekend, AP.9 was shamelessly trying to breathe life back into the story ... because when he was asked about the rumors he was still bangin' Coco, the rapper looked into the camera like he LOVED the attention and said, "That's a RUMOR? Is that a rumor?"

He added, "No comment man."