A variation of "really" first used in Luxembourg in Europe by an old ancient master named "Master Oli".
Is often used in response to a question that just shouldn't be asked or in an arrogant way where someone expects the other person to lie. Commonly used between friends and never with unknown people.
~*Kimmy*~: you know i would always invite u otherwise.
O l i v i e r : relley?
~*Kimmy*~: yes, relley!