As easy as tough-boiled eggs are to make,they're a pain to peel, that is until I learned this hack. It involves shaking the egg in a glass cup with a bit of water until the eggshell breaks into a million shards. It seemed totally unfathomable until I tested it out myself and discovered it's totally legitimate! Here's how it's done.
Fill a glass cup or a mason jar with about 1/2 inch of water. Then add the egg. whether you fill a mason jar, or screw on the lid.
Turn the cup to the side,pressing one hand over the open conclude so the water doesn't pour out.
Start shaking! Don't let the egg roll around the glass, but rather make sure it's hitting the sides of the glass. You'll open to see the eggshell cracking . . . Keep shaking until the shell slips off! Rinse the egg under cold water to remove any small shell shards, and then be pleased.
Source: popsugar.com