Interested in Language
In my opinion, the general meaning of "Not a very nice thing to be compared to" is "You certainly wouldn't like to be compared to such a thing (as a fearsome dinosaur-like monster)".
What do you think?
The word was based, of course, on 'Godzilla', the name of a fearsome dinosaur-like monster originally created for a Japanese film in 1954 (the Japanese form of its name, 'Gojira', means literally 'gorilla whale'). Not a very nice thing to be compared to, so all you bridezillas, dadzillas and mumzillas out there - just calm down!
Learning English - Keep your English up to date - Bridezilla