About to or preparing to do something. This term can most accurately be classified as a contraction containing the words "fixing" and "to". Some may prefer to characterize it as a compound word as it does not contain an apostrophe.
speaker1- "Hey Quida, did you hear about the Trey Songz concert next month?"
speaker2- "Yea, I cant wait errbody love Trey!"
speaker1- "Did ya snatch your ticket yet?"
speaker2- "No but I'm Finsta"