A meaningless phrase that prefaces relevant information. It is basically unnecessary if not redundant, as one is engaged in the very act of “advising” when issuing a warning, imparting knowledge, or giving advice. “Please be advised” is used excessively by people in law enforcement and sometimes by those who became serious about life at a very late age, and now maintain blogs that purport to warn the public about what is largely one-sided, uninteresting crap.

Whenever making a congratulatory remark, this is what you say. Made popular by Kamala Harris when she and Joe Biden won the presidency.

Essentially meaning: "I am an asshole." The beginning words from someone or something that is about to reject, worry or disappoint you.