Shaggy has a characteristic speech pattern marked by his frequent use of the filler word "like" and a pubescent voice that often cracks.

His signature attire consists of a baggy green V-neck T-shirt, loose maroon or brown bell-bottom pants, and black shoes.

In The 13 Ghosts of Scooby-Doo and early made-for-TV films, he wore a red V-neck and blue jeans.

Shaggy's favorite meal is an "extra cheese pizza with pickles," as revealed in the TV film Scooby-Doo!

and the Monster of Mexico, it is revealed by Fred that the reason Shaggy eats so much (while maintaining his slender physique) is his "high metabolism".

However, in Scooby-Doo: Behind the Scenes, it is stated by Fred that the real reason Shaggy is so skinny is because he is a vegetarian (a reference to Casey Kasem's veganism).

revealed that his taste for unlikely foods (such as chocolate-covered hot dogs and liverwurst "a la mode") is a consequence of a young Shaggy receiving a garbage disposal unit for his first toy.

Normally, Shaggy becomes extremely scared when faced with monsters or other frightening situations, usually displaying cowardice to a much greater degree than any other character except for Scooby.

[9] Unsure what the voice of a hippie would sound like, Kasem based his vocal style and mannerisms for Shaggy on those of Dick Crenna's character Walter Denton from the radio/television sitcom Our Miss Brooks.

Innes reprised Shaggy in Harvey Birdman, Attorney at Law and a DirecTV commercial featuring the Scooby gang in 2008.

[15][16] An alternative version of Shaggy, an African American school newspaper reporter referred to exclusively as Norville, appears in Velma.

But as healthy as Shaggy tries to stay, he has battled unhealthy habits such as the time he developed an addiction for Scooby Snacks for a few months.

He also states that he wears a different belt buckle for every mystery if one pays attention, the joke being that his baggy shirt always hides them.

in the episode "Frankenhooky" where they stop The Ghost Chasers from attacking Yogi Bear and Boo-Boo at an abandoned cheese theme park.

[61][62] Lillard also reprises his role in the platform fighting game MultiVersus, in which Shaggy is a playable character.

Legend of the Phantosaur in which a hypnotized Shaggy fights off a gang of bikers, set to the song "Kyūkyoku no Battle" from the Dragon Ball Super soundtrack.

The video became a popular internet meme, inspiring fan art of Shaggy as a powerful warrior akin to a Dragon Ball character.

[69] Some viewers of the original Scooby-Doo believed that Shaggy smoked marijuana due to his hippie behavior and constant hunger.

[9] One scene which made it into the film has a minor character introduce herself to Shaggy as "Mary Jane" (a slang term for marijuana), and he responds, "Like, that is my favorite name."

"[70] In an online radio interview with host Stu Shostak, series creators Joe Ruby and Ken Spears recalled that they never intended for Shaggy to be a marijuana smoker, and "took umbrage" at the jokes in the 2002 film.

[8] In reference to this urban legend, the 2002 first season Harvey Birdman, Attorney at Law episode "Shaggy Busted" revolves around Shaggy and Scooby-Doo being mistaken for recreational drug users and arrested while they are en-route to the rest of the gang, with Fred Jones hiring Harvey Birdman to successfully defend the duo, with "the [opposing] prosecutor bring[ing] up questionable clips from old Scooby-Doo episodes that show the characters running through smoky rooms and pausing mid-blink so it looks like their eyelids are drooping" ahead of their innocence being proven.