This Karen costume is easy to pull off for your very own quick DIY Karen costume for this Halloween. Have no idea what a “Karen” is?
Karen is a pejorative term used in the United States and other English-speaking countries for a woman perceived as entitled or demanding beyond the scope of what is appropriate or necessary. A common stereotype is that of a white woman who uses her privilege to demand her own way at the expense of others. Wikipedia
This do it yourself or DIY Halloween costume is so easy to put together that you probably already have everything. You could switch out the labelled coffee cup for a Hello name sticker
There are also Karen Halloween masks