do·do

/ˈdoʊˌdoʊ/ noun, pl -does or -dos [count]

1 : a type of bird that lived in the past and that was large, heavy, and unable to fly

2 US, informal + humorous : a stupid or silly person

That dodo can't do anything right.

I feel like a complete dodo.

(as) dead as a dodo — see ↑dead, 1