Maine Mendoza flexes 'flabby abs' in new bikini photo

What are "flabby abs" anyway?

Maine Mendoza on Instagram Tuesday posted a new bikini photo where she looked incredibly happy, and her mid-section absolutely toned.

But in the caption, the Phenomenal Star said those are, what she calls fake and flabby abs.

"Flexing the happiness...and the fake and flabby 'abs'," she wrote complete with a wacky face emoji. She used the hashtag #opticalillusion.

In just 20 minutes of posting, Maine's photo has already generated nearly 20,000 likes and 174 admiring comments.

Whether your abs are real or not, you look absolutely gorgeous, Maine! — LA, GMA News