from
Jargon File (4.4.4, 14 Aug 2003)
STR
Spot the reference. Used in {scary devil monastery} to mark the
witticism one just uttered as a quote from some work of art or
literature, the more obscure the better. Those who know where the
reference comes from reply in the form "You are $CHARACTER, and you
owe me $ITEM", where $CHARACTER is a character from the story being
referenced and $ITEM is something associated with that character. This
acronym is never actually expanded to its proper meaning in the
newsgroup; posters instead use obscure expansions, the most common
being "slurp the robot", leading to comments like "I pulled my hair
out, but couldn't figure out which robot you're slurping".