Signalling to another via the medium of text the fact you are carrying out an action, in this case, the movement of raising the shoulders, which highlights the point you are basically saying 'I don't know' or 'whatever' but in a non-verbal manner.
Rob: Guys who is the coolest person ever?
Greg: I KNOW! I KNOW! It has to be rob!
Rob: Yes Greg. Yes it is.
'Greek God' or 'David' by Michelangelo
Often used by singaporeans to describe those individuals who possess an almost spiritual, apparational and superior status. Derived from the famous name of a Singapore hero who is meant to have bedded many beauties due to his charm and good looks, it is now thought to be an urban legend due to the fact everyone claims to know the 'Colledge'. May have come from the university students and mispronunciation of the word 'College' to mean something sexual.
Greg: Where is Pete dude?
Rob: He ended up in bed with three lovely ladies last night
Greg: Damn! He did a Colledge! Wont be seeing him for days:(