I think that he was trying to be funny by changing around your words, Osso.
I stand by my stuffiness
, 'though I'm not one of these people who read grammar textbooks too often for fun, who start criticising people on the bus:
'That's Jargon!
That's a conjunction at the end of the sentence!
Oh my sweet Lord, that's a... a... colloquialism...
*dies from hyperventilation.*'
You don't get many people that bothered about language anymore, which is a shame...