New Democrat MP Pat Martin is standing by an expletive-laced expression of anger and frustration on Twitter Wednesday night, saying even politicians are allowed to vent.

Martin lost his cool on Twitter while the Conservative-dominated House of Commons voted to shut down debate on the federal budget bill.

"This is a f------ disgrace...closure again. And on the Budget! There's not a democracy in the world that would tolerate this jackboot sh--," Martin tweeted.

He followed up with another comment asking "In these uncertain economic times, don't you think our parliament should be debating our federal budget? Some due diligence?"

On Thursday, he appeared on CTV's National Affairs and said he stood by his tweet, because it properly expressed his frustration.

"This has been a pattern about this Parliament and I'm getting very frustrated frankly at being forced to curtail debate once again and I did Twitter in frustration," the Winnipeg MP said.

But the initial Tweet wasn't all, he said. Martin went on to tell off followers who criticized his post, telling one person to "F--- off" and directing the Bart Simpson-coined expression "Eat my shorts" at another.

Then on Thursday, when the Twittersphere began to question whether Martin's account had been hacked, he unabashedly owned up to posting the tweets.

"Nope. Not hacked. Just truly pissed should have seen them last night laughing and joking in their smug ignorance," he explained on Twitter, referring to Conservative MPs' behaviour in Commons.

The Winnipeg MP also declined to delete the Tweet, and refused to apologize for what he called a sincere response to extraordinary circumstances.

Martin said while the NDP is sticking to a polite protocol in Parliament, etiquette on Twitter is still "evolving" and he's actually been getting positive feedback.

"A lot of people say it's rather refreashing to hear a politician speak their mind and not stick to their talking points," he said.

NDP interim leader Nycole Turmel said in a statement emailed to that the fiery language was out of line, but provoked by a legitimate frustration.

"His language was not appropriate and could have been offensive to some," Turmel said in the statement. "That said, the Conservatives' actions are not appropriate in a democracy and offensive to all Canadians."