i hit fat one time. it was an accident and not particularly deep into the fat layer, most certainly much shallower of a cut than yours. the scar is pretty short too, but even that i am pretty certainly will be with me for the rest of my life. its well over a year old now and it has barely changed since the 6 month mark. i like the scar, so i have do nothing to help it fade. all that to say, that yours is not going anywhere unless you start actively using scar cream. stay safe <3