That expression is an idiom.
Meaning it is unpopular
The saying "dead as a dodo" came from the fact that the dodo became a symbol of extinction of a species. Within 70-90 years of the dodo being discovered, it had been hunted and preyed to extinction. The saying "dead as a dodo" had a finality about it - it was irreversibly, undeniably dead, and there was no hope.
Another saying for "dead as a dodo" would be "dead as a doornail."
Well, dodo birds are dead and if someone says that it means you're dead like not almost but dead.
Because dodo birds became extinct about 400 years ago, so therefore none survived. Therefore, if something's "dead as a dodo," it's undeniably dead.
Its Dead...
As a dodo.
They are dead.
Dead
The dodo has been extinct since the 17th century. Hence the phrase, 'dead as a dodo'.
no, dodos are extinct
Dodo
Well until the world ends, once its dead..its dead.