What does Can-Trick mean?

Can-Trick meaning in Urban Dictionary

The Can-Trick is a method of identifying if/when lunch is here for the day(at lunch-sponsored companies). A member of staff will walk with an empty soda can with their business's lunch space to see if lunch is here during the day. Making use of an empty soft drink can escalates the odds exponentially that lunch will actually be truth be told there whenever effort is manufactured.