Sure you can do that, gmail is very flexible re email addresses and creating sort of disposable ones by using variations on your address. To do this you use your email address name eg myaddress then adding a + then what text you want to identify the address you are using it for eg hotelscombined so you end up with email@example.com (this is a sham address just to show usage). Then set up a filter in gmail to capture that address when it appears and direct it to whatever folder you would like it to be sent to eg junk, bin, or a specific folder you may wish to create. Though Gmail allows you to easily select the filter “Skip the Inbox (Archive it)” tick box for the address you created.
I prefer to use Abine’s Blur for my disposable addresses just using their free account. It is also available for Smartphones. It allows in the free version for you to generate unlimited disposable addresses (that do not expire until you delete or block them) plus will generate and remember passwords and logins for you if you wish to use that part. I use blocking sometimes instead of deletion if it is a site that addresses the problem issue or is one I want to limit when I receive emails from them. Deletion is permanent removal of the address.
An important note about Blur disposable addresses is that there is no compromise of my “real” email address…as an example of one of my older and blocked email addresses is firstname.lastname@example.org (they now use blurme.com instead of opayq.com), as you can see no one can detect what my real email address is whereas with the gmail one anything before the + is the real address of your account.
A snip of the part of the pages of the contact control of Blur for my addresses:
There are other providers of disposable addresses, with some generating the address for only a short period, others allowing semi-permanent ones like Abine do.
https://temp-mail.org/en/ is definetly a temporary address provider
On Github a user has provided a very long list but I cannot swear to the safety or accuracy of most of the sites they list (use any of at your own risk after careful study of their credentials & usage terms and limits) https://gist.github.com/michenriksen/8710649
Originally a 2012 list but updated to 2017 so most should still be operating can be found at https://www.ghacks.net/2012/05/31/the-ultimate-disposable-email-provider-list-2012/