there wasn't really an inside joke, I will post the earlier part of the conversation to provide back story. Space Children is an MST3K episode and Mike is familiar with it, the strange names and odd quotes are amusing things from that episode.

Ursalicious: I'm watching Space Children
C--------F------: what?
Ursalicious: "his sitting was out of control by the end"
Ursalicious: for some reason, I found that high-larious
C--------F------: ah, so
Ursalicious: so?
C--------F------: 'strue
Ursalicious: yep
Ursalicious: col. Manley, Dr. Woman, its great
Ursalicious: those names are quite metaphoric though, Manley and Warman
C--------F------: Manly is a sweet name, and I want to be Mike Manley
Ursalicious: I was in debate with a Lisa Manley
Ursalicious: "phone the devil"
C--------F------: the debate was "phone the devil?" what did you argue?