Flynn has written three satirical books: You're Grand: The Irishwoman's Secret Guide to Life,[2][3] Giving Out Yards: The Art of Complaint, Irish Style[4][5][6] and Rage-In: Trolls and Tribulations of Modern Life [7] She was a founding member (with Sue Collins and Anne Gildea) of comedy singing group "The Nualas".

[10][11][5] She uses satire for activism, as in YouTube sketches such as "Racist B&B", "Armagayddon" and "The Case for Mammy / Daddy Marriage".

[16] In 2021, 2022, 2023 and 2024 Tara joined Marian Keyes for a BBC Radio 4 programme Now You're Asking, in which they discussed problems sent in by listeners (they called them "askers").

[19] In 2013, a Kinsale man called Austin, an African American, a racial slur.

This incident led Flynn to create a comedy sketch satirizing racism in Ireland, which gained 85,000 YouTube views in two days.