everything but pattern + neighbors

hi everybody

here is a sed piece of shell script

sed -n -e '/$1/{x;1!p;g;$!N;p;D;}' -e h $2

this is taken from a really nice sort of tips&tricks of a 
guy's blog
it prints a pattern + neighbor lines, a preceding and 
following one

here is novice kind of question,
if one wants to follow same logic but get everything and NOT 
that pattern matched and its neighbour lines

how do you do it chaps?

many thanks