following suit

A Series of Unfortunate Events #5: The Austere Academy (Hardcover, Deckle Edge) ㅣ A Series of Unfortunate Events #05 2
레모니 스니켓 지음, Brette Helquist 그림 / Harper Collins / 2000년 8월

The expression "following suit" is a curious one, because it has nothing to do with walking behind a matching set of clothing.

If you follow suit , it means you do the same thing somebody else has just done.

(p69)