He first appears in "Butterfly Effect", and since then, he has made many other appearances and cameos. In "Intern for the Worse", he returns as the main antagonist.
Personality
He appears to be a smug opportunist and a swindler, as seen in "Come Sale Away", where he manages to cheat each Loud sibling by giving them "Lily's blanket" in exchange for their garage sale money.
In "Out on a Limo", Lincoln states that he never gives him free smoothies, which means that Flip is stingy.
In "Intern for the Worse", he comes between Lincoln and Clyde's friendship, by making them compete for higher ranking staff positions at his store, much to his advantage.
Flip is also a very repulsing man, as seen in "Intern for the Worse" where he sells expired milk, and uses the melted cheese machine to put his dirty clothes, mostly his socks. He also falsifies lottery tickets with a black marker. The oil he uses in his store was actually hot dog grease. His disgusting behavior is shown again in "Roadie to Nowhere", where he has so much gunk on his teeth which Rita tries to remove. He also has a false tooth made out of beef jerky.
He cares a lot for his profits, but has no regard for safety or lives of his customers, because in "Washed Up" he let Louds hire a broken boat from him. He blamed them for ruining it, despite it was his own fault.
Flip is also an opportunist, as seen in "Last Loud on Earth" he used the storm as a distraction to steal some burgers from Burpin' Burger.
Appearance
Flip is an elderly man of short stature. He has gray hair, and a bald spot on the top of his head. He also has a gray mustache, and eyebrows as well. He wears a white t-shirt, brown pants, and black shoes. In Season 1, he had white eyebrows, but starting with Season 2, his eyebrows are gray.
In "Intern for the Worse", he wears a red button-up shirt, rather than his usual white shirt.
In every appearance afterward, it looks like he goes back to a shirt that resembles the one he had in the first season, but it's red instead of white.
Trivia
According to Lisa in "Butterfly Effect", Flip is the only person in town who will hire a four-year-old with no experience. It's unknown if this is true, or just part of Lincoln's fantasy.
The fact that he cuts corners, tampers with the expiration dates, and has unsanitary conditions with the food he sells, is similar to Apu from The Simpsons.
The fact that the slushies he sells have their own name, are similar to the Squishees, that Apu sells at the Kwik-E-Mart.
He received a slight redesign in Season 2, with the main one being a different mustache design.
In "No Spoilers", his shirt resembles the one he had in the first season, but it's red instead of white.
It is revealed in "Snow Way Out", that Flip owns a Humvee, which he uses as a snow plow.
In "Roadie to Nowhere", it is revealed that he has bad dental hygiene which he states that running his store was more urgent, and furthermore, according to Rita, his appointment has been ready for ten years.
In "Net Gains", it is highly likely he has went to prison before since one of the inmates recognized him as both he and Lynn were driving by.
In "Deal Me Out", it is revealed that he also runs a pawn shop business, 'Pat's Pawn and Prawn, and ticket reselling business, Tucker's Tix and Tux.
It was revealed in Lucy's episode of Listen Out Loud, that his great-great grandfather, Gip, founded the first ever business in Royal Woods, called "Gip's Girldes 'N' Garters".
In "The Spies Who Loved Me", it is revealed that Flip has impatience issues, as his struggles to fix the Flipee machine and nacho cheese machine completely aggravates him.
In "Recipe for Disaster", it is revealed that he was once a middle school delinquent and was in the same middle school as Lynn Sr.
