Unpopular ship that gained some traction from SNAFU's "Manifest Doom" ( >>94604525
) where it is revealed that Dib and Gaz are human/irken hybrid experiments
. There are a few other fics with a similar premise, and the idea gets tossed around every now and then in our recent IZ threads.
Personally I find the irony of Dib having an alien mom adorable.