よく言(い)うto say enough (as much as required), to say plenty

Expression, う-verb (う)

1. 1.

   to say enough (as much as required), to say plenty

2. 2.

   to say well, to say cleverly, to say elegantly

3. 3.

   to say often, to say frequently

4. 4.

   to say without shame, to say impudently

   oft. as an admonition in the form of よく言うよ