Robert Pataki, known better by his nickname "Big Bob". Big Bob, also known by the initial "B" by Miriam, is a fictional character on Hey Arnold!. Since Miriam was supposedly born in 1952, it is safe to assume that Bob is around the same age (more than likely older), putting his age somewhere around 45-50 during the series' original run.
He owns a chain of beeper emporiums called Big Bob's Beepers, though he also may have another small business selling high-tech camping equipment ("Roughin' It"). Big Bob serves as the antagonist to Arnold and his family in several episodes ("Save the Tree", "Grudge Match", "Runaway Float" and most notably "Parents Day".) He is voiced by Maurice LaMarche.
Big Bob is indeed big; he looks like he was at one point muscular, but has let himself go and started becoming overweight. He boasts the same eyes, ears, nose, and unibrow as his daughter, Helga. He has gray hair, combed to the left side (though in the movie, he has brown hair). Most of the time, he wears a short sleeve green golf shirt with a golden crown on the left side by the chest. He wears dark brown pants and big white belts.
Bob is very self-centered and only seems to care about his image as the "Beeper King", though he does in one episode undergo a change in life and let go of all of his material things ("Big Bob's Crisis"). He is also extremely competitive and often takes his competitiveness too far, such as when he called Arnold and his grandparents "some orphan boy and his ancestors" in "Parents Day". During competitions, he often makes angry remarks toward his competitors. He expects perfect performance from his daughters at all times. This is apparent by how attentive he is towards them. Because his oldest daughter, Olga, is a multi-talented achiever, he shows an apparent favoritism towards her, while he often ignores his younger daughter, Helga, and often forgets her name, calling her Olga time and time again. He has a very short temper and seems very thick headed, such as when he ran through poison ivy in "Roughin' It". His two catchphrases are saying "Hey....Hey-Hey-Hey-Hey-Hey!", which Helga has adopted, and "criminy" which has also been picked up by Helga. He is a huge blowhard. However, despite his self-centered personality, it is shown on several occasions that he does actually care about others, including Helga, and somewhere within is a conscience and a big heart.
It has been shown in several episodes that Bob's favorite show is Wheel of Fortune, or a similar show that exists in the Hey Arnold universe. Bob drives a blue Lincoln Continental Mark V and also owns an olive drab Hummer.
- Bob owns a large Hummer decked out with army decals. It was only used once in "Arnold's Halloween" to travel through Hillwood which was thought to be invaded by aliens. It was mentioned again in "Arnold's Thanksgiving" when Bob was dressed up as a soldier & he was going to use it to track down Helga when she went missing.
- Bob's Hummer is only seen in a few episodes, and his daily driver is a blue Lincoln Continental Mark V with vanity license plates that say "BIG BOB." The Lincoln is seen in many episodes, driven by both Bob and Miriam, and seems to be the Pataki family car. The powerful luxury coupe fits Bob's personality almost perfectly.
- Also on "Arnold's Halloween", Big Bob has commented about losing money over football games, indicating that he gambles on them.
- In "Helga and The Nanny", Big Bob mentions that he has not had potato dumplings since his "baba" last cooked them. Seeing as how "baba" is Ukrainian for "grandmother" as well as pierogi (potato dumpling) being an Eastern European dish, it can be assumed that Big Bob is of Ukrainian descent. However, Bob could have also said "papa", which is a generic term that can mean either "father" or "grandfather". Additionally, "Pataki" is a Hungarian surname.
- Despite that in the show he had what seemed like grey hair, in the movie his hair was brown.
- He isn't on good terms with the parents in MCF stories due to his antagonist behavior and forgetting their names.
- He has a bit of a problem with Helga dating Arnold.