What is "tuxis"

TUXIS was a boys’ program similar to the Scouting movement promoted by Canadian Protestant churches. There are a number of variations of what the acronym "TUXIS" is said to stand for. Most commonly, it is said to stand for "'you' ('U') and 'I' in 'T'raining and 'S'ervice with Christ ('X') in the centre." Another similar meaning was "Training Under Christ In Service".