Combination of English and German spoken by expats in Germany (mostly in Berlin) and Germans who keep on switching between both languages. Words in one language are replaced by words from the other, that are more convinient or come to the speakers mind more quickly. Usually the grammar is adapted for these words so they fit into the sentence structure.
While the phenomenon of unsophisticated people ill-using english words for the sake of their approach to coolness does exist, it is usually not referred to as "denglisch".
denglish: "I don't yet have an überblick of what needs to be done. Kannst Du mir morgen helfen to plan this out?"