Originating from the Beatles song "Glass Onion" off their 1968 self-titled, or "white" album, the term was believed to mean a glass-lidded coffin by the followers of the Paul is Dead conspiracy.
The real meaning of the song is that people were over-analyzing the Beatles' lyrics.
A glass onion is something that would have layer after layer peeled away, only to realise that it was transparent all along.

A pick me is a woman that is willing to do anything for male approval. She will embarrass or throw other women under the bus to achieve this goal. The unfortunate thing about a pick me is usually the men they are trying to seek approval from are of poor quality and treat women badly, leaving little real benefit for the pick me.

Originated from the Beatles song "Glass Onion" from their white album. It means to overanalyze something that is not intended to mean anything more then what it is. The entire point of the Glass Onion song was to poke fun at all the people who had looked for deep messages in previous beatle songs.

A coffin with a glass lid

An effect that can occur during an LSD trip where the user sees the world in a similar way to how one would in a video/photograph taken through a fish-eye lens (or from inside a glass onion).

A pipe made of glass or lexan that is used to smoke marijuana or narcotics through, the term "Glass Dick" is too well known and the term "Glass Onion" is less known to the square non drug addict crowd and drug abusers love to use it due to a beatles song that talked about a glass onion and everyone knows about the beatles and their drug use, Glass is also a street term for crack cocaine.

Brittish slang for a monacle, inspired the Beatles' song, Glass onion.