MANCHESTER, N.H. - Weaponizing a debate-stage insult that has become a rallying cry for female supporters of Hillary Clinton, Senator Elizabeth Warren let fly a stern, swaggering warning on Monday to Donald J. Trump: "Nasty women vote."
In a blistering rebuke of Mr. Trump, with Mrs. Clinton seated and smiling onstage beside her, Ms. Warren took furious aim at the Republican nominee's personal and political record, ticking off his history of disparaging remarks during the election and reminding the crowd of the many accusations of sexual assault against him.
"He thinks that because he has a mouthful of Tic Tacs that he can force himself on any woman within groping distance," Ms. Warren said, alluding to Mr. Trump's invocation of the breath freshener in a 2005 clip that found him boasting about forcing himself on women.
Ms. Warren said, "Women have had it with guys like you." Then she added the adjective: "Nasty women have really had it with guys like you."
It was the description that Mr. Trump had deployed, five days earlier, in a heated debate exchange with Mrs. Clinton during Wednesday's debate. Since then, the term "nasty woman" has become a rallying cry, the stuff of quickly-produced knockoff T-shirts among admirers of Mrs. Clinton.
"Nasty women are tough. Nasty women are smart. And nasty women vote," Ms. Warren said, her voice building. "We nasty women are going to march our nasty feet to cast our nasty votes to get you out of our lives forever."
Even by Ms. Warren's standards of fiery delivery, it was a rousing address, jolting an outdoor campus crowd of thousands at Saint Anselm College. Amid chants of "Hillary," students watched from the windows of an ivy-covered building behind the stage, the autumn foliage appearing to glow in a midday sun.
"I could do this all day, but we've got a great speaker here," Ms. Warren said, after recalling Mr. Trump's caustic words about African-Americans, Mexicans and Muslims, among others.
Taking the microphone moments later, Mrs. Clinton suggested she would not have minded waiting a little longer.
"I don't know about you," she began, her hair blowing a bit in the wind, "but I could listen to Elizabeth go on all day."
If Mrs. Clinton was not quite so explicit about her opponent, she plainly reveled in Ms. Warren's introduction.
"We're up here without our phones so we can't check tweets, but I kind of expect that if Donald heard what she just said, he's tweeting away," Mrs. Clinton said. "She gets under his thin skin like nobody else."
Mrs. Clinton made a gentler appeal on gender grounds, while describing her penchant for planning.
Women, she said, "make lists. And we try to write down what we're supposed to do and cross it off as we go through."
Both speakers took care to emphasize the importance of down-ballot races, an argument that has become more prominent at Clinton events in recent weeks as her campaign places a higher priority on lifting Democrats in congressional contests.
If Democrats retake the Senate, of course, Ms. Warren is certain to emerge as a pivotal figure.
On the roster of high-profile supporters bolstering Mrs. Clinton, Ms. Warren is viewed as perhaps the likeliest to turn from ally to adversary should Mrs. Clinton win the White House.
Along with Senator Bernie Sanders, who has also crisscrossed the country for the Clinton cause in recent weeks, Ms. Warren stands as a progressive check on Mrs. Clinton's more centrist tendencies, eager to condemn the outsize influence of Wall Street and rail against the Trans-Pacific Partnership, which remains a source of wariness for some Clinton skeptics in the Democratic Party.
Mrs. Clinton supported a version of the trade agreement, before opposing the final product during the primary after intense pressure from liberal activists and Sanders supporters.