Sloppy Joes (Angie's Yum Yums)

2 lbs. ground beef
1 t vinegar
short 1/2 c brown sugar
1-2 cups ketchup
1 T mustard
a little bit of flour

Brown the ground beef.  Add enough flour to soak up the grease.  Add the rest of the rest of the ingredients.  Adjust ingredients to your liking.