on *:input:*: if ($istok(/me,/ame,/describe,$1,44)) && (»»—» isin $2-) haltdef
but it only work, when you type it manually, so probably there's no sense in it
To stop an automated action.. I don't think it's possible. The only way is to rewrite the aliases of me, ame, describe and to check the characters there. IMHO.