This is a cyborg version, to put in the OUTCHAT handler. It features the on
 off commands of "back on" and "back off":

 back GLOBAL

 ;backwards speaking utility, created from idea given by Aquilae's copy
 ;by foxy, Aquilae's version originally by Mog

 { 1 back - back = "" CHATSTR = } CHATSTR "^back o[nf]f*$" GREPSTR IF
 { "" bck =
  { { CHATSTR "^(.*)(.)$" GREPSTR POP 
       "$1" GREPSUB CHATSTR = bck "$2" GREPSUB + bck = }
    { bck CHATSTR + bck = "" CHATSTR = } CHATSTR ".." GREPSTR IFELSE
   } { CHATSTR "." GREPSTR } WHILE
 bck CHATSTR =
 } back IF