It's probably muscle gains, and if u have a large frame 275 may be the high resistance barrier where the fat are in stubborn areas like stomach and hips(btw anyone got good idea to lose those?)

I hear the scalpel does wonders for spot reduction.

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I've only skimmed the responses to your question, so forgive me if I'm being redundant. Have you tried zig-zagging your calories? Basically, it's just alternating your calorie intake each day so that you get the same total at the end of the week (e.g., 1400 x 7) but you're eating a different number of calories on most days. This website helps you to calculate it:

Zig-Zag Calculator for Fat Loss and/or Muscle Gain

I'm a member of other weight-loss forums, and I've read about many people who busted their plateau by doing this.

I haven't read the posts but zig zagging is great for people who don't have a lot of fat to lose at all.

If that's not the case though, simply taking a break is a better bet in my mind. Less messy.

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Sorry, but I don't think your trainer knows what he's talking about. You probably would NEVER want to drop to a 1400-1600cal diet. A 30-year-old male coming in at 5'10" and 220 lbs needs to be eating about 2160 calories per day, if he had a sedentary job and did absolutely no exercise, to maintain weight. Of course that will help you lose weight in the beginning, but in the long run, it's horrible for you! Your metabolism will slow down to a crawl, so your body will hang on to everything you eat and convert it to fat to save up for a "starvation period" should another one come along. Eat sensibly, and eat enough. If your daily maintenance intake is 3,000 calories, you can probably safely cut about about 500 calories just from food intake. With a good hour or so of decent exercise you're probably burning an additional 400-600 calories. So, if you eat 2,500 calories a day, and burn off another 500, you are 1000 below your daily maintenance. 3,500 calories are equal to one pound. If you're burning 1000 calories a day, 7 days a week, you will burn 2lbs per week, guaranteed. However you should NOT be trying to burn more. If you do, do so by exercising more -- not eating less. Eating at the kind of deficit that you are is not healthy for the body. It needs its nutrients!