root/scripts/notin.sh

#!/bin/sh
#1) Create a file of words you want to filter out.  Save it as "stoplist"
#2) cat <file> | ./notin.sh > file without any lines that include entries in stoplist

for dont in `cat stoplist`
do
      strings=$dont\|$strings
done

if [ -n "$strings" ]; then
      strings=`echo $strings|sed s/\|$//`
      expr=" -v $strings -E"
      grep $expr
else
      cat
fi