An
acronym for " Gang Bang Day", GBD is a term used to describe a busy or
full day where there is
one thing right after another, nonstop.
Person1: Man, I had the busiest day: I worked a full
shift, went bike riding right after
work, then had just enough time to
shower quickly and catch a movie with friends all before getting a late dinner.
Person2: Wow, sounds like a GBD to me.