Small dick confidence
When someone give the expression of being macho and grandiose. But when the time comes to deliver, they under fulfil and you are left severely disappointed.
Friend A: Did you see Dave last night at the party? He was on fire!
Friend B: ohh I was with him last week, hes nice to talk to but once you get to know him you will see he's just small dick confidence.
Friend B: ohh I was with him last week, hes nice to talk to but once you get to know him you will see he's just small dick confidence.