I have heard this comment on more than one occasion. I can't even begin to describe how much this irritates me. As a trainer and figure competitor I practice what I preach in terms of training daily and eating clean. However, I do have my cheat meals whether that's sushi or chicken wings, but I get right back on track the next day or meal. My point being, I work frigging hard for the body I have! It's a constant journey and lifestyle. So, if you want something bad enough, work hard for it, you'll get the results you want and will stop making excusing for yourself.
Other excuses include: I'm too old, I have kids, I have a cold, etc... It's not a matter of "I can't exercise today, but when can I exercise today." have a great weekend!