1. An expression used to justify an opinion or to qualify a statement. Often used to add validity to one's remark and to encourage others to express their agreement.
2. An abbreviation for "I am saying" or "I believe this to be true" or "Do you agree with my opinion?"
A slang way of greeting someone or saying hello.
It is said and then a handshake is presented by the sayer. You shake the persons hand and then proceed to fist bump them.