Ughh, I remember years ago I had a freiend who when she was chewing her food would take a gulp of water / juice then carry on chewing the food before swallowing, it was as if she was making a mush that would be easier to swallow. At the end of her meal she'd also gargle the water in her mouth before swallowing, I imagine to dislodge any food in her teeth, it was nauseating. The worst thing was I actually believe she thought she was being discreet and no one noticed.
She also had a weird habit of chewing with her front teeth instead of her molars which made her look like a beaver. Haven't seen her in 4 years, wonder what happened to her.