Josef, correct; sorry! I say guy-zer--only two syllAbles...
Don't think I've heard glesher; all I've ever heard here is glaysher.

I Is'nt a true Britspeaker Compared to here, you are! ;\)
This phrase reminded me of a story my husband came home with some years ago. He had a probationer sitting at his desk when another officer came by and said he thought Hubby's guy had been involved in a purse snatching. The guy reared up his head, straightened his shoulders, and said with mingled pride and outrage, "I ain't no puhss snatchah: I is a ahmed robbah!"