GR translation: so there’s that vague, full-boweled pleasure at the windfall

[Mike Jing]

V651.32-36  Phoebus isn’t exactly thrown into a frenzy. It’s happened
before. There is still a procedure to follow. It means more overtime for
some employees, so there’s that vague, full-boweled pleasure at the
windfall, along with an equally vague excitement at the break in routine.
You want high emotion, forget Phoebus.

What does "full-boweled" mean here?
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