In many countries, especially those formerly part of the former British empire, a brigadier is either
the highest field rank or most junior general appointment, nominally commanding a brigade.
A "Beerbrigadier" is
the highest rank pisshead amongst a band of
alcoholics on a "pub crawl". The ruling "Beerbrigadier" of the beer brigade decides what pub is best, what beer is tastiest, and what fat slag is worth shagging.