basics of the word is a txt slang used to denote a feeling break down of the word is Lets Go Mental, when a feeling of euphoria is felt towards an occasion or when you feel like throwing caution to the wind or wanting to have tell every one to just go that little bit mental
send a TXT to a mate askin if he wants to go to pub and he says not sure working tommorrow you to get o come on LGM its friday
An acronym for 'let's get maggot'. Used as a quick explanation/question to friends when you have no real plans but know you will be getting very merry.
A:"hey mary, what are you up to tonight?
M: "not sure Angus, LGM?"
A: "sounds good, i'll be at your's in 20"