Even though the face may be blurry, the body shape sure wouldn't lie. They'd know it was you.
What type of messed up body shape do you have that would be so easily identified on that picture? 3 arms, 6 legs???
Assuming you have all the "normal" body parts, I do think there is anything in that fuzzy image to allow someone to say ....."Hey let's check out this fuzzy naked picture of Carly_Roach" since they can't see your face.