How can I create an additional disposable email address in gmail?

if you are wordsandnumbers@gmail.com you can also be wordsandnumbers+morewords@gmail.com as well as words.and.numbers@gmail.com. You can put periods anywhere in your screen name and it will change it. You can then filter out things that go to those e-mails so that they go automatically to your trash.

How can I create an additional disposable email address in gmail?
If you are example@gmail.com then you can use example+something@gmail.com
Reply:No. Use http://www.mytrashmail.com/