(games) A children's game where players must carry out only those commands that are preceded by the utterance "Simon says".

(colloquial) Who says so; on whose authority?

(colloquial) I say so; on my authority.

Used to soften the effect of a statement that is self-aggrandizing or is embarrassing to the listener.

(idiomatic) Used to ask someone if they are willing to do something. / (idiomatic) Used to remind a child to say a polite expression.

(idiomatic) Indicating that nothing that could be said would add to or improve the situation.

Used to introduce, or alluding to, an apt adage.

Regardless of what you think.

Alternative form of if I do say so myself

(idiomatic) To publicly express a sentiment which one is expected to keep to oneself; to reveal an ulterior motive.