(colloquial, humorous) Somebody is failing to respond, react or comprehend.

(humorous) Somebody is conscious or paying attention, but failing to understand.

(simile, colloquial) In an extreme manner; excessively; like crazy.

(informal) Somebody of no importance or significance.

plural of Joe Nobody

(humorous) It is easy to conceal one's identity on the Internet.

An action or occurrence must be very bad indeed if it brings no benefit to anyone.

Alternative form of nobody ever went broke underestimating the intelligence of the American people

Alternative form of nobody ever went broke underestimating the taste of the American people

Americans, as a group, are not especially intelligent and can be readily entertained or fooled to produce financial benefit for someone.