'Nincompoop', 'sozzled' and 'bonk' are among a list of words which could become extinct within a generation.
According to a new survey of 18 to 30-year-olds 'trollop' and 'boogie' are also on the way out.
According to a new study, getting sozzled and having a boogie with a pair of old trollops would mean absolutely nothing to young people today.
They are among the words that could die out in the next 10 years.
According to the study by data group Prospectus Global, 40% of 18 to 30-year-olds do not know what sozzled - a euphemism for being drunk - means.
While 37% claim to be confused by the word 'wally'.
Other words that are causing confusion among millennials and Gen-Zers are 'balderdash', 'betrothed' and 'bounder'.
Language professor at WIT, Chris Mulhall, explains why words come in and out of fashion.
"Particularly those that are the slang, or fall into the domain of slang - sozzled, wally, nincompoop, boogie, trollop - all of those.
"They're a little bit, if you can imagine them as like, a fashion.
"They can be locked to a generation".
Reporting by: Kim Buckley