In British Parliament, you can heckle your opponents, but calling someone a liar is still specifically prohibited:

[link]

Unparliamentary language

Language and expressions used in the Chamber must conform to a number of rules. Erskine May states "good temper and moderation are the characteristics of parliamentary language". Objection has been taken both to individual words and to sentences and constructions ‐ in the case of the former, to insulting, coarse, or abusive language (particularly as applied to other Members); and of the latter, to charges of lying or being drunk and misrepresentation of the words of another. Among the words to which Speakers have objected over the years have been blackguard, coward, git, guttersnipe, hooligan, rat, swine, stoolpigeon and traitor. The context in which a word is used is, of course, very important.

The Speaker will direct a Member who has used an unparliamentary word or phrase to withdraw it. Members sometimes use considerable ingenuity to circumvent these rules (as when, for instance, Winston Churchill substituted the phrase "terminological inexactitude" for "lie") but they must be careful to obey the Speaker's directions, as a Member who refuses to retract an offending expression may be named (see below) or required to withdraw from the Chamber.

Via John Hodgman's Twitter feed:

"BREAKING: SC has changed its state motto to: "SO ANYWAY! DID YOU HEAR ABOUT ELLEN DEGENERES ON AMERICAN IDOL?"

Loving JH.

Help me, lord, I'm debating the healthcare bill on a friend's FB page. Fortunately, the twits aren't my friends so I can walk away.

Help me, lord, I'm debating the healthcare bill on a friend's FB page. Fortunately, the twits aren't my friends so I can walk away.

A twit who IS my friend (well, a friend who's being a twit) just declared "Look, sorry to be controversial so early in the morning, but the new plan has a few holes".

I congratulated her on having read all 1,200 pages overnight. She hasn't replied.

GOP rebuttal doc sued 8 times for malpractice.

Raise your hand if you're surprised. Anyone? Bueller?

During the PMQs a couple years back, David Cameron asked "Can we believe what the prime minister says?" and then calls him a phoney. [link] The whole exchange was newsorthy, so I don't think that's typical, but still.

The guy I'm debating with claims that even if the bill explicitly forbids spending fed funds on illegal alien health insurance, "we will end up paying for everything."

I asked him to explain just how that will happen and am awaiting his response breathlessly.

Wow, eight times? You gotta work hard to get sued that much.

Frankly, I think the bill should cover illegal immigrants. And abortions, but that probably just makes me a communist.

Jessica, I agree with you on both counts.

::sits in the commie corner with Jessica and smonster. thinks we all look fabulous in red::