Step 1: The phrase "pull a fast one" means to deceive or trick someone. It is often used to describe a situation where someone gets away with a dishonest or sneaky action.
Step 2: Now, analyze the options:
- To pull forcefully could imply a physical action, but it's not related to deception.
- To pull someone who is fast is an incorrect interpretation of the phrase.
- Lifting a heavy load refers to a different meaning altogether and is unrelated.
Step 3: Therefore, the correct meaning of "pull a fast one" is to deceive, which corresponds to (iii).