Final answer:
In the episode 'Customer Survey' of The Office, Jim uses the fake name 'Bill Buttlicker' to rattle Dwight during a customer service training.
Step-by-step explanation:
In S5E6 "Customer Survey", Jim uses the fake name 'Bill Buttlicker' to rattle Dwight during their customer service training with Michael. Jim pretends to be a disgruntled customer named Bill Buttlicker who is unhappy with the quality of the company's paper products. This prank creates a humorous and tense moment between Jim and Dwight.