Lower Bottom of Beamer Slide

I’m trying to put a large space in my Beamer slide. After some initial text I used a vfill and then the text that’s suppose to be at the bottom. But the bottom is very high. I’ve tried various textheight type commands with no luck. I don’t want to use vspace with a specific measurement because the size of the top and bottom text changes on each slide (and sometimes I have titles/headings).

How do I lower the bottom of the text?

Here’s a MWE:

documentclass[t]{beamer}
usepackage{beamerthemeboxes}

begin{document}

frame{p vfill

bottom}

end{document}

The slide looks like this:

documentclass[t]{beamer}
usepackage{beamerthemeboxes}
begin{document}

frame{p vfill

bottomvspace{-fill}}

end{document}