[15] The band began touring regionally up and down the south-eastern United States, occasionally opening for bigger acts such as Eyehategod and Chuck Mosley.

[16][17] Expanding upon their sound and stage show, the band brought local musician and haunt actress Parker Lampley into the line-up to perform flute, keyboards, vocals, as well as contortion.

[18][19] This small independent release later caught the attention of Needlejuice Records, who signed the band the following year and subsequently re-released Hooliganism on a double vinyl LP and cassette.

[21] The following month on February 13, 2020, the band released Sabbat Worship on Needlejuice; an EP featuring three bonus tracks from the Hooliganism sessions.

Originally appearing on the label's Needlejustice charity compilation to raise money for the NAACP defense fund in midst of the then-recent George Floyd protests,[26][27] the band made it widely available for streaming on the 51st anniversary of the Stonewall riots.

[31][32] While under quarantine, the band decided to continue work on their next venture: a full-length album of re-recorded and rearranged material from their Tridroid releases, entitled Rephlummoxed.

[4][33] While finishing the album, Others by No One vocalist and guitarist Max Mobarry joined the band after filling in last minute for Chase McCutcheon after he had fractured his wrist before a show.

[38][39][40] Throughout some of these shows, Flummox supported bands such as Imperial Triumphant,[41] Sarah and the Safe Word,[42] Daikaiju,[43] You Bred Raptors?,[44] Pentagram, and The Obsessed.

For Decibel Magazine's Deciblog, Jeff Treppel wrote "[the band] clearly digs Primus, Mr. Bungle, and Mastodon," but added "...despite some fairly obvious influences, they never sound like a straight ripoff.

"[65] Flummox is also known for their unpredictable and theatrical stage-shows that utilize a variety of props as well as musical improvisation, audience participation, choreographed gags, performance art, and sketch comedy.

"[34][40] A common bit in their song "Oh, Possum" is for Dellinger to "transform" into an opossum by disappearing behind the stage, returning costumed as the animal, and acting out various traits such as playing dead, jumping into trash cans, and crawling on all fours.

During live performances of their song, "Black Phillip" (a song inspired by plot elements from the 2015 film, The Witch), Dellinger dons a goat mask and performs a mock child sacrifice by cutting open a baby doll full of candy; hand feeding the candy into the mouths of audience members before she tosses the remains of the doll into the crowd.