History ShoutOut / ItsAlwaysSunnyInPhiladelphia

** The high school student Charlie tries to mentor is a {{Juggalo}}.

** Frank's sex scene in ''Lethal Weapon 5'' is reminiscent in its self-indulgence and awkwardness to a similar scene in ''Film/TheRoom''.

** In order to outline how superior he is to Frank, Dennis states that his musculature is in exact proportion to Michelangelo's ''Art/{{David}}''.

* "Dennis Gets Divorced" has Maureen beating herself on the chest like Creator/MarkWahlberg in ''Film/Fear1996''. It takes Mac and Charlie a few moments to figure out the reference.

* "Dennis Gets Divorced" has Maureen beating herself on the chest like Creator/MarkWahlberg in ''Film/{{Fear}}''. It takes Mac and Charlie a few moments to figure out the reference.

* "Mac's Mom Burns Her House Down" contains many references to ''LiveAction/GoldenGirls''. Mac attempts to get Mrs. Mac and Mrs. Kelly to talk about the same subjects the Golden Girls talk about, and even sings a few bars of the theme song.

** There are repeated references to ''Film/TheWiz'' and ''LiveAction/QuantumLeap'', especially in the ending.

** Charlie's fantasy is a reference to the opening montage in ''WesternAnimation/{{Up}}''.

** Mac tries to emulate the plot of ''Film/TheSecretOfMySuccess'' and sings the "Day Bow Bow" (Yello's Oh Yeah) song featured in the film.
** Charlie "losing his mind" is a recreation of John Nash's schizophrenia in "A Beautiful Mind"

* The ending of "The Gang Gets Held Hostage" has Frank in ''Film/DieHard'''s John [=McClane=]'s role with a pistol taped to the back of his head, and he even tosses Liam [=McPoyle=] off the roof of the pub like Hans Gruber. His line, "Yippy-kay-yay, Mister Falcon!" is the dubbed line from the edited-for-television version of [[Film/DieHard2 the sequel]] that replaces "Yippy-kay-yay, mother fucker!", which makes this an ActorAllusion since Danny [=DaVito=] was in that movie.

** Frank nicking Cricket with the trash can as "The Trashman" at the end of the episode is somewhat based off of ''Wrestling/MassTransitIncident the infamous Mass Transit Incident'', since both involved a blading accident involving amateurs.

** Geoffrey Owens plays himself masquerading as football player Donovan [=McNabb=]. The gang recognizes him from his recurring role on ''Series/TheCosbyShow'', and the coach makes it a point to insist he's "[[SuspiciouslySpecificDenial not the guy from]] ''Series/TheCosbyShow''."

* Frank keeps editing parts of Franchise/{{Rambo}}'s life into his own past in "Mac & Dennis: Manhunters".

** Mac tries to emulate the plot of ''Film/TheSecretOfMySuccess'' and sings the "Day Bow Bow" song featured in the film.

* "The Gang Does a Clipshow" features a segment in which the gang misremembers the ''Series/{{Seinfeld}}'' episode "The Contest" as one of their own schemes. The cast even don the same costumes as their counterparts in the show and filmed on a recreation of Jerry's apartment. Fitting, as the show has been characterised as "Seinfeld on crack."

* "Lethal Weapon 5"
** One of the high school students is a {{Juggalo}}.

* “Sweet Dee Gets Audited” is the introduction of Wolf Cola, another of Frank’s schemes which would blow up in his face years later. Its awkward shoe-horing into situations it doesn’t belong in and predatory existence from a legendary scammer is quite similar to real life cola scheme Kooba Cola from Victor Fox, a man who like Frank never met a scheme he wouldn’t pull. Fox’s exploits include getting sued by DC Comics for ripping off their characters, declaring himself The King of Comics after losing said suit while both companies occupied the same building and spitting out the elevator at their offices, signing up in middle age to fight the Nazis, and Kooba Cola, a soda that never existed but he hyped in Fox Feature Syndicate’s comics and [[ComicBook/BlueBeetle The Blue Beetle Radio Show]] to attempt to sell it to someone else to produce and use the existing hype. It did not work.

* “Sweet Dee Gets Audited” is the introduction of Wolf Cola, another of Frank’s schemes which would blow up in his face years later. Its awkward shoe-horing into situations it doesn’t belong in and predatory existence from a legendary scammer is quite similar to real life cola scheme Kooba Cola from Victor Fox, a man who like Frank never met a scheme he wouldn’t pull. Fox’s exploits include getting sued by DC Comics for ripping off their characters, declaring himself The King of Comics after losing said suit while both companies occupied the same building and spitting out the elevator at their offices, signing up in middle age to fight the Nazis, and Kooba Cola, a soda that never existed but he hyped in Fox Feature Syndicate’s comics and [[ComicBooks/BlueBeetle The Blue Beetle Radio Show]] to attempt to sell it to someone else to produce and use the existing hype. It did not work.