"relentlessly talking" is correct and usable in written English.
You would use this phrase to describe someone who is talking for a long time, without pausing or taking a break. For example, "My little brother was relentlessly talking about dinosaurs all night."
In this context it is embarrassing and unnecessary for Gallop and De Bohun to relentlessly talk about football becoming the number one spectator sport.
"We hope that the spotlight that has been shone on to the careless and inhumane treatment of learning disabled people leads to actual (and not just relentlessly talked about) change.
Critics have compared him to P. T. Barnum, and he certainly has a skill for self-salesmanship: this spring, he relentlessly talked up Costco's decision to discontinue stocking "The 4-Hour Body" — a decision he suggests was made on account of the explicitness of a chapter entitled "The 15-Minute Female Orgasm" — and the ensuing controversy inspired a marketing bonanza of prurient Google searches.
That night, as James relentlessly trash-talked his former teammates and tormented his native northeast Ohio, the Heat seemed to strip the Cavaliers of their early-season resolve while stealing their newly minted credo, "All for One, One for All".
Four years later, after a lengthy book tour and talking relentlessly about these issues on campus, she found that the numbers had flipped: 68 percent of women negotiated, versus 65 percent of men.
In keeping with tradition (OK, my personal tradition) of talking relentlessly about Drake, here are a few of the observations we've gleaned from the 6ix god and his latest record.
He listens closely when I point out Jones' self-proclaimed attributes include him being relentlessly hard working while talking honestly and often spikily.
While Mr. Murphy showed a command of policy details, Ms. McMahon relentlessly stuck to her talking points, at one point repeating a series of sentences verbatim after an earlier attempt had been drowned out by a moderator.
Last month, on the Huffington Post, I wrote about NBC's "Erin Burnett problem" after she relentlessly spouted Wall Street talking points on Meet The Press.
