Andy Hall wrote:

Sto lat (that's Polish for 'cheers') - Stefek

Oh. Last time I went, people were saying Na zdrowie. Is that another?

Yes, "na zdrowie!" is the commonest drinking toast. "Sto lat" literally
means "a hundred years"; it's the first words and running theme of the
birthday/he's-a-jolly-good-fellow song, along the lines of "may s/he
live a hundred years". So you'd toast "Sto Lat" more often when
re-united with a mate you hadn't seen for a substantial period of time.

Where our West Country's most prolific fantasy author came across it I
don't know - and a momentary Google on '"sto lat" Polish Pratchett'
doesn't reveal any accounts of Terry getting wildly drunk in Bristol's
Polish Club while he was working on the Bristle Een Poes / Wessun Daily
Press a couple of decades ago. Though I suppose we could always start a
rumour ;-)

Stefek