A Fix
Fixing to is when you're just about to start something, like you're getting ready to jump in a pool, but you're still standing on the edge.
Text: 'I’m fixing to start this workout, but I still have snacks.'
DM: 'Fixing to break up with my girlfriend, but I haven’t told her yet.'
Tweet: 'Fixing to eat this entire cake, but I still have a mouth.'