Wassailing was associated with rowdy bands of young men who would enter the homes of wealthy neighbours and demand free food and drink (in a manner similar to the modern children’s Halloween practice of trick-or-treating). If the householder refused, he was usually cursed, and occasionally his house was vandalized. The example of the exchange is seen in their demand for “figgy pudding” and “good cheer”, i.e., the wassail beverage, without which the wassailers in the song will not leave; “We won’t go until we get some, so bring some out here”.Such complaints were also common in the early days of the United States, where the practice (and its negative connotations) had taken root by the early 1800s; it led to efforts from the American merchant class to promote a more sanitized Christmas.

Yeah, Christmas is the cheerful time when you celebrate your love for thy neighbour. That of course means buying more shit from the “merchant class”, not demanding that they participate in the society they robbed to grow rich.