have a quick one—(sl.)
1. have a drink before one does smth. else:
- We had a quick one and admired the bar, then left and had a wander around the town center.
2. said of a brief and brisk sex act:
- I guess I’d been upstairs long enough for him to think I’d had a quick one off with the girl.
pull a fast one—(sl.) cheat or deceive a person:
- I signed a contract on a house, and I think my realtor pulled a fast one on me.