bewe is an abbreviation for beach week. using the first 2 letters of both words, beach week. beach week is a week during the summer where the recently graduated hs seniors go to a beach with their friends for an entire week.
Pronounced in the same way as "viewer" (and sometimes spelled "biewer") the term bewer refers to a fat slob - usually a woman, but can also refer to a man.
I wanted the last sausage rolls at the buffet, but some fat bewer got there first.