When you're a lightweight when it comes to alcohol and after knowing that you've been drinking, you think that you are more drunk than you actually are.
When you think or put on an act to show how drunk, or not drunk, you actually are and often can annoy your friends.
Girl 1: Have you seen Sara?
Girl 2: Yeah, she's absolutely Connied!
Girl 1: I know!
Girl 2: Bit annoying really, only had on Bacardi Breezer and a can of Fosters.
A girl that has only had, for instance, one can of beer and one Smirnoff Ice and she's already rolling around on the floor, and her friends are becoming annoyed.