The inclusion of "47 percent" on the list after a leaked video showed Romney telling donors that 47 percent of Americans would definitely vote for Obama because of their dependency on the government capped off a bad year for the losing presidential candidate.

Photos: Bieber, Kesha, Psy perform at Jingle Ball concert

Collins received over 7,000 submissions on its online database.

Related: South Korea minister hopes Gangnam Style can spur service sector

Twelve words of the year - one for each month - were then selected on the basis of the frequency with which they were spoken, how many places they appeared and their longevity in public discourse.

Appearing on the Collins words of the year list is no guarantee of insertion in the next dictionary.

But Gangnam Style stands a very good chance, Brookes said.

"It's obviously a craze, so there's the possibility it will go away. But it's been heard by so many people that I think it's probably earned the right to go into the dictionary."

Other words of the year include "mummy porn" after the popularity of the "Fifty Shades of Grey" books, and "superstorm" after Superstorm Sandy wreaked havoc along the east coast of America in October.