LOL Theory: The theory that the internet phrase, lol, meaning "laugh out loud," can be placed at any part of any sentence and make said sentence lose all credibility and seriousness.
Example 1 - Doctor: we need to operate on your colon lol, you have cancer
Example 2 - Jesus: Take this all of you and eat it, it is my body, lol.
Example 3 - Me: Will you marry me? Lol.
Source: Urban Dictionary