being a "Robert" refers to someone who constantly uses the same moves in a video game and/or camps. More specifically in multiplayer games. This "Robert" will constantly button-mash the same button or camp in the same area and then refer to his/herself as a "good player". He/she will defend themselves swearing it isn't cheating and is very fair.
Pulling a Robert is when you are depressed and you post on multiple social networking sites that you're gonna kill yourself but you actually aren't and you are just looking for attention attention whore if you will
the act of 'doing a robert' consists of either having an irrational fear of bananas, being too scared to do simple rudimentary instructions or having a very small penis.
'ere look at him'
'I know right?'
'why is he running from a banana?'
'ah, he must be doing a robert!'