Lets Get High
Acronym used online or in text messages when the sender does not want others to know what he/she is talking about, especially when there is fear of parents or any other figure who would oppose smoking reading the message.
Not commonly used but it is catching on.
Person 1: What do you want to do tonight?
Person 2: Im not sure
Person 1: LGH!
Person 2: alright man!