Why Meghan McCain calls Jennifer Lopez "a deeply unpleasant person"

Former co-host of "The View," Meghan McCain, calls JLo a "deeply unpleasant person."

While she says the entertainer is getting bad-mouthed and dog-piled these days -- which is odd ... 'cause she just threw some extra shade herself with an ugly anecdote.

The ex-talk show host didn't have very nice things to say about J Lo on her most recent podcast episode -- recounting a time when Jen was on "The View," and claiming she was "deeply unpleasant" ... and, allegedly, not a very nice person.

Meg doesn't specify what year this all happened, but says that during a time when Jen was a guest on the show, she just wasn't all that sweet -- and didn't fake it either. Here's what she said in her podcast and also a video of Jennifer appearing on "The View"