I'll type it in the best I can...where I heard it said this way is noted below...
zjay zjair le coolt
The z and j are pronounced sort of together, sort of like you would pronounce the beginning of the French name Jacques. At the end of coolt, there would be a trailing off r sound that you might not even hear a lot of the time when people are saying it properly. The L in that word is also not very pronounced.
I had a funny experience at a well known used dealer in Toronto once. I went in there looking at all the overpriced used watches, and asked if the had any JLC's (I pronounced it the correct way) and I was specifically looking for one model. The first thing the "lady" said to me (stopping me in the middle of that sentence to correct me) is that I was saying it wrong, and the first name is "yay-ger". I said "That's funny, because when I was at the factory in Switzerland last year, no one there said it like you do."
She then told me they didn't have any, and I walked out...