The frustration with President Barack Obama over his tax cut compromise was palpable and even profane at Thursday’s House Democratic Caucus meeting.

One unidentified lawmaker went so far as to mutter “f— the president” while Rep. Shelley Berkley was defending the package the president negotiated with Republicans. Berkley confirmed the incident, although she declined to name the specific lawmaker.

“It wasn’t loud,” the Nevada Democrat said. “It was just expressing frustration from a very frustrated Member.”

Rep. Jerrold Nadler (N.Y.) was also overheard saying that “we can’t trust him” not to cave to Republicans and extend the tax cuts again in two years, according to a Democratic source.

The anger aimed at the bill was widespread. As Democrats moved to block the bill from coming up on the floor, chants of “Just say no!” could be heard by reporters outside the room.

Berkley is one of the few Democrats publicly supporting the package. While she said it wasn’t necessarily how she would have written it, the bill should go forward in her estimation because it is “chock full” of tax cuts that will help the working class in her state.

“I’m not willing to play Russian roulette to see who blinks first,” Berkley said.

Steven T. Dennis contributed to this report.