Perfect Girl
A perfect girl is the same as a regular girl but with equal parts sweet and dry vermouth (a martini typically uses dry vermouth and a Manhattan typically uses the sweet but the perfect Manhattan or perfect martini uses both).
Example:
Girl: I’m here. I got the vermouth but I didn’t know if you were making martinis or Manhattans so I picked up a bottle of each.
Boyfriend: Well aren’t you the perfect girl.
Girl: I’m here. I got the vermouth but I didn’t know if you were making martinis or Manhattans so I picked up a bottle of each.
Boyfriend: Well aren’t you the perfect girl.