A week has 21 meals. If you eat 3 types of food per meal, you will make 63 food choices per week. A person can choose meat for one of those 63 choices (1.6%) and still be a vegetarian. Many folks choose meat for 30% or more of their diet.
Eating meat 1.6% means your NOT a vegetarian, it just means your 'mostly' vegetarian.
I'm not saying there's nothing wrong with people eating meat, but most vegetarians I know (myself included), who are in it for moral reasons would take offense at that definition.
Maybe a lot of people want to try and be a 'vegetarian' (I dunno to sound cool?), try it for 3 months and fail constantly. These aren't vegetarians, just pretentious.
I've been a 'veggie' for 25 years and I haven't eaten meat, nor anyone else who I know who are.
My favorite trivia here is a study which documented that, of people who self-describe as "vegetarian", one third will admit to having eaten meat in the past one (1) week.