(that's) enough (of this) foolishness
1. Stop this foolish behavior. Bill: Enough of this foolishness. Stop it! Sally: Sorry. Father: That's enough of this foolishness. You two stop fighting over nothing. Bob: Okay. Bill: Sorry.
2. I have had enough of this. (Does not refer to something that is actual foolishness.) Andy: Enough of this foolishness. I hate ballet. I'm leaving. Sue: Well, please leave quietly. Sally: That's enough foolishness. I'm leaving and I never want to see you again! Bob: Come on! I was only teasing.
See also: enough