Fetching details from the dictionary...
so to speak; so to call it; as it were
彼かれはいわば生まれうまれながらの天才てんさいだ。
He is, so to speak, a born genius.
これはいわば最後さいごのチャンスです。
This is, as it were, the last chance.
いわば自業じごう自得じとくということだね。
So to speak, it is self-inflicted.