This two-minute video features some of the 50,000 new words which have been added to the latest edition of the Collins English Dictionary (read my review here). How many of the words do you know? You can find some definitions here and here. You can look the rest up in the online version of the Collins Dictionary.
Call My Bluff is a popular British TV game show that goes back to the 1960s. Two teams of three celebrity contestants take it in turn to provide three definitions of an obscure word, only one of which is correct. The other team then has to guess which is the correct definition, the other two being "bluffs". This would work very well as a classroom activity with more advanced learners using the new words from the Collins Dictionary. Give each team with one or more of these cards with a 'new word'. Then get the teams to come up with two 'fake' definitions for each word, and you're ready to play the game. See here for a more detailed lesson plan, and here to watch a complete episode of Call My Bluff from 2004.