Globish is a portmanteau neologism of the words Global and English. It is a simplified version of the English language that uses only the most common English words and phrases. It is used by non-English-speakers of various native languages.
This is what Wikipedia has to say about it. It sounds kind of like a pidgin, however it also mentions 1500 words, which seems quite a bit larger than what you would normally see in a pidgin, and in fact, a large vocabulary for someone to learn when they aren't actually learning the language.
With 184,000 ghits, I would say it is certainly close to common usage. Still, I've never heard it before. I wander if it is most common outside of places where English is the native language, that is, outside of the USA and UK.
Speaking as a certified (and some days certifiable) linguist, I would be very surprised if there are 1500 words held in common among all of the variations used in all of the places where "English" is kinda-sorta used but not really spoken. I'll wait and see, but I remain suspicious until I see documentation.