Screaming-Meemies is a 17 letter English word. It's valid Scrabble word worth 14 points. It's valid Words with friends word worth 18 points.
You can make 1416 anagrams from letters in screaming-meemies (-aceeeegiimmmnrss).
1925-30; reduplication with alteration of screaming; see -y2, -s3
14
18