sitter-in

English

Etymology

From sit in or sit-in.

Noun

sitter-in (plural sitters-in)

1. One who attends a class, meeting, etc.
2. One who takes part in a sit-in protest.
   • 1960, LIFE, volume 49, number 12, page 42:

     Except for a few adult leaders like the Rev. Robert Williams, shown below conducting a strategy seminar, the sitters-in are youngsters like Virginius Bray Thornton who, at right, is leading a march through Petersburg.