Abbreviated as LOP, laughing off the pounds referrers to the feeling of laughing so hard it feels as if one is getting abs. is used in instant messaging, texting and other electronic communication to indicate that something is humorous, LOP can be used instead, or in place of LOL, LMAO or HAHAHA. It implies that the sender is laughing hard enough to burn a significant amount of calories so as to loose weight, thus laughing off the pounds
The video of a dancing cat was so funny that I felt as if I had lost ten pounds after laughing at it, so I sent it to my friend who replied LOP (laughing off the pounds), indicating that she felt the same as I about the dancing cat video.