Defrosting Ice King: Comes off as incredibly cold and nasty towards everyone, but by the end, he learns to let his past go and make amends for how he treated everyone, including Whitey, Eleanore and Jennifer.
Drowning My Sorrows: Davey turned to alcohol after he lost his parents. Getting drunk was the only way he could distract himself from the crushing grief he felt after they died. As a result, hes somewhat emotionally stunted as he never learned to properly mourn their passing, but hes finally able to come to terms with their deaths towards the end of the film.
Freudian Excuse: His unpleasant nature comes from the fact that at 12 years old, during Hanukkah, his parents got killed in a car crash on the way to his basketball game that he finally wins. After his parent's deaths, Davey was sent to a series of foster homes until he turned 18 years old and spent the rest of his adulthood in various unsuccessful jail and psychiatric programs to cure his alcoholism and depression over the incident.
HeelFace Turn: Eventually gives up his criminal ways and starts becoming a genuinely good person.
Ink-Suit Actor: Davey looks exactly like his voice actor. Right down to the same hairstyle.
Jerkass: He is a rude, alcoholic jerk who enjoys making others' lives hell.
Jerkass Has a Point: His "The Reason You Suck" Speech was exceptionally harsh, but he did have a good reason to get angry after Whitey was talking about the night his parents diedright in front of him, and after Davey said multiple times not to bring it up.
He was moments away from getting arrested right in the middle of the awards ceremony, to everyone's understandable delight, but he makes himself be heard about how they didn't treat Whitey any better than he did.
Never Be Hurt Again: Likely the cause for his behavior towards others. He acts like a jerk because hes actually profoundly sad as a result of his parents tragic deaths; by pushing others away, he doesnt have to own up to his true feelings of sorrow.
Davey: Listen, if they have an award for the freakiest looking fraternal twins... who nobody even gives a crap about, you two are definitely winning. But that patch thing ain't ever gonna happen for you... because the truth is, nobody in this town even knows you EXIST!
Eleanore: You're an animal!
Davey: And you're bald! (tears off her wig)
Eleanore: Not again!
Whitey: You're not welcome in my house.
Davey: Good, your house SUCKS!
The climactic song number is this to the rest of the town for not giving Whitey the appreciation he deserves, but especially himself for the above.
♪Everyone in this room has been associated with Whitey either through basketball or the mall or various odd jobs he does around town for free or at most a dollar // And I'm guessing 99% of you have either laughed in Whitey's face or ruthlessly made fun of his feet or voice or sister or shortness when he wasn't looking // But the next time you'd see him he'd still go out of his way to smile and wave at you and ask you about your mother's operation or something like that because he, unlike us actually cares about someone other than himself // The reason I bring this up to you is because I was the worst offender of all...♪
Incest Subtext: During a flashback, Whitey slow dances with his mother (as no one else wanted to dance with him at the prom), and during the dance, he accidentally gropes her bottom (given that he's way smaller than her). Despite this accidental groping, his mother seemed surprised but kept smiling and laughing nonetheless.
Innocently Insensitive: Talks about Davey's past to Eleanore, which Davey clearly didn't like remembering. He also tries to consult the second-grader whom Davey insulted, though unfortunately, it only makes the kid feel worse.
Whitey: He was just kidding, son. You've got very nice boobs.
Iron Butt Monkey: Whitey undergoes a series of injuries like being trampled, falling from a tree, and being near frozen to death throughout the film while being no worse for wear afterward.
Keet: Is very optimistic and energetic, even during his ending seizure.
Nice Guy: Is very friendly and supportive of everyone around him.
Broken Bird: Implied by Whitey, since Jennifer had just came back to her hometown to raise her son by herself in a mall bakery after a messy divorce from a husband of 12 years who left her for a woman he met on the Internet. Not to mention her falling out with Davey whom she clearly cares for but is repulsed by his obnoxious behavior for most of the film.
Nice Girl: Is a kind woman towards her son and everyone around her.
Strong Family Resemblance: In one of the flashbacks during Dave's basketball winning game, Jennifer bears a striking resemblance to her mother who looks very identical to her own adult self in 20 years.
We Used to Be Friends: With Davey. After Davey's incident, she stays away from him and no longer enjoys his company.