Keystone Cops are those old time black-and-white fictional, incompetent policemen who featured in silent movies between 1912 and 1917. There is always a chase, they run zig-zag (never straight), no one gets hurt despite crashes and scrapes aplenty and are shown at a fast speed.
Golden Girls (198-1992) and Maude (1972-1978) are television shows that starred Bea Arthur.
The puppy from the Andrex (an English toiletpaper) commercial is a cute little yellow Labrador puppy that was replaced by a digital version in 2010.
Earth-616 is the main Marvel comics universe.
Headpool is a zombified head from Earth-2149 (a largely identical parallel universe). He was once worshiped as a god by natives in the Savage Land. He was eventually killed by an evil Deadpool who hunted and exterminated alternate Deadpools.
Dogpool was a dog (from Earth-103173) who had his origins much as the origin Deadpool (was experimented on). Then he escapes, is helped by circus performers and joins the circus. His experimenters recognize him but Deadpool arrives, before they can get him, and takes him back to his world via portal.
Lady D (Lady Deadpool from Earth-3010), or Wanda Wilson, is a female version of Deadpool. She ultimately sacrifices herself and her ship, Bea Arthur, to end an evil Galactipool from destroying all the versions of Deadpools in the multiverse.
Cable, Nathan Christopher Charles Summers (Earth-616) is the son of Scott Sumemers (Cyclops) and his wife, as a weapon against Apocalypse and this has been fighting in wars most of this life. After losing the war, he began to travel through time and eventually returned fifteen years older than his father.
Black Mamba, Tanya Sealy a callgirl from Erath-616, was invited to join the Serpent Society by Sidewinder, his criminal organization. She has been fitted with an implant that allows her to have slight telepathy as well as projecting a cloud of energy known as darkforce.
B.A.D. Girls (Asp, Black Mamba and Diamonback) were founding members of the Serpent Society. But when Diamondback was sentenced to be executed (for dating (Captain America), they got free and formed the B.A.D. Girls (with initials taken from their codenames).
Marvel Girl is a name that has been used by many female heroes including Jean Grey and Rachel Summers.
Mr Fantastic is the roomba that Hawkeye named after Richard Reed (of the Fantastic Four fame). It is one of the slower, less intelligent roombas.
The Enchantress is an Asgardian who most often is allied with Loki and was once romantically involved with Thor.