Joiner's cry?

• Statement from the bandwagon
• "I want to, as well"
• "I feel the same"
• Movement opposing sexual harassment and assault
• 'So am I'
• Hashtag that took off in October 2017
• Campaign phrase of 1952
• Women's movement started by Tarana Burke
• Emotion not in order for this movement

Wiktionary Word definitions in Wiktionary
phr. (context Internet English) (deliberate misspelling of me too lang=en nodot=1)(non-gloss definition: , used to indicate agreement.)