When one person does something wrong but you have to smack everyone in the group to ensure no one else does the same thing.
Person 1: He wasn't complaining about me, was he?
Person 2: No, it was someone else but I had to blanket slap all of you anyway.
Person 2: No, it was someone else but I had to blanket slap all of you anyway.
by VidkidVidkid May 18, 2017
Get the blanket slapmug.