According to the urban dictionary, I am Groot is used when you dont know what to say or when you want to sare off/confuse people around you.
I dont agree with that. Groot never used that phrase because he didnt know what to say. He used that phrase because he very much wanted to only say that. He also never wanted to confuse/scare people around him. I think in Groot's understanding 'I am Groot' really translated to 'I am great' . And he kept on reminding that to himself and everyone around him.
And that is a great thing to do.
So yes, I am Groot. And you are Groot too.
#FanTheory