There's actually a physical reason for your fat getting all squishy -- and it's a GOOD thing!
When your body starts burning stored fat, it goes for the intramuscular fat first -- the fat marbled inside your muscles (like the fat in a steak). That intramuscular fat kept the fat surrounding the muscle firmly in place, nice and tight and hard.
Once you lose the fat in the muscle, the surrounding fat is loose and flopping around because its anchor (the fat marbled throughout the muscle) is gone. Everything starts to wiggle and wobble like Jello!
Tell yourself that fat getting jiggly is a very good thing! The next step is for that jiggly fat to disappear. So remember, if your fat is getting jiggly, it's on the road out of town.