RIS means 'I don't get it' even though the abbreviation doesn't match.
(
halfsixty had sex with your mother on,
Fri 18 Jul 2008, 13:03,
archived)
ahhhhhh
I see.... I'm editing and making it "low budget" now.... I'm just too easily excited
(
DrBatman,
Fri 18 Jul 2008, 13:08,
archived)