Continuity mistake: When the band is sound-checking just before the party, the clock behind Trent has no hands on it. Then when the party starts, the clock has hands once again.
Continuity mistake: Inside the pizza restaurant, the front door opens on the opposite side compared to how it's designed from the outside.
Answer: "Mack Daddy" was a 90s phrase meaning "Ladies man," and Mack simply doesn't like the stupid nickname.
Brian Katcher