The phrase "portion of one's revenue" refers to a specific amount or percentage of income that is earned by an individual, company or organization. This can include any earnings generated from sales, services provided, investments or other sources. The term "revenue" specifically means the total money received from business activities before expenses are taken out. Therefore, when someone says they want a portion of one's revenue, it implies that they desire to receive a share of the income earned by another person or entity.