The phrase "hast finger in" might seem confusing in terms of spelling, but it is actually a common phrase in the English language. The word "hast" comes from the Old English word "hæfst" and is pronounced /hæst/ in IPA transcription. "Finger" is spelled phonetically as /ˈfɪŋɡər/, and "in" is simply spelled as it sounds, /ɪn/. Together, "hast finger in" means to be quick to take advantage of an opportunity, and it's a helpful phrase to add to your vocabulary.