Several Tory MPs have criticised Chuka Umunna over comments he made in 2006, describing London's nightclubs as "full of trash".
Chris Heaton-Harris, MP for Daventry, said: "The secret life of Chuka Umunna has been exposed. In public he likes to portray himself as a man of the people. Yet we know in private he has a lack of respect for the public.
"Chuka, or should I say Harrison, has been outed as the ultimate champagne socialist who revels in living the high life, brands the public C-list celebrities and trashes our capital city.
"You can't get more out of touch than that."
Nadhim Zahawi, MP for Stratford-on-Avon, added: "Chuka, like many Labour MPs before him, loves the glitzy wealthy lifestyle, only in secret! If you've worked for it and earned it why would you need to hide it? Or is it because it doesn't go down well with his anti-enterprise lefty Leader?"
A spokesman for Chuka Ummuna has apologised if "lighthearted" comments the shadow minister made in 2006 caused offence.
The spokesman told the Daily Mail: "Though his user account on the site still exists, he has not posted a thread on the site for many years, since long before he was elected as a Member of Parliament."
"In terms of the post from 2006, these were comments made on a private social network well over half a decade ago.
"Though light-hearted in tone and context, and made long before he became an MP, Chuka accepts the choice of words used were not appropriate and apologises if any offence may have been caused."