Continuity mistake: Throughout the episode, the girl in Jane's painting rests her head on her hands. In her reflection, her hands are turned outward on her chin even though she is sitting there with her hands turned inward.
Continuity mistake: When Daria is on the couch with her dad she's holding a mug but the next shot it's a glass. (00:15:39)
Other mistake: In one scene in this episode, the clock on the kitchen wall (behind Jake) does not have any hands.
The New Kid - S2-E7
Plot hole: In the season two episode 'The New Kid,' Daria and Jane are discussing The New Kid in gym class when a girl takes a nasty spill from a trampoline. Later, Daria and The New Kid are heard remarking about photos taken of that particular fall despite there having been no photographers present.
Answer: "Mack Daddy" was a 90s phrase meaning "Ladies man," and Mack simply doesn't like the stupid nickname.
Brian Katcher