I shall have worked up an appetite with all this heavy work.
form or accumulate steadily; "Resistance to the manager's plan built up quickly"; "Pressure is building up at the Indian-Pakistani border"
If you work up the enthusiasm or courage to do something, you succeed in making yourself feel it. Your creative talents can also be put to good use, if you can work up the energy
If you work yourself up, you make yourself feel very upset or angry about something. She worked herself up into a bit of a state Don't just lie there working yourself up, do something about it. see also worked up
come up with; "His colleagues worked out his interesting idea"; "We worked up an ad for our client"
If you work up something such as a piece of writing, you spend time and effort preparing it. I sketched the layout of a prototype store and worked up a business plan
If you work up a sweat or an appetite, you make yourself sweaty or hungry by doing exercise or hard work. You can really work up a sweat doing housework