On an internet message board or forum, a skip quote is when one poster replies immediately after another poster, but does not reply to the most recent poster. Instead, he quotes and replies to a preceding post above the most recent poster. For example, reply #5 in a thread is quoting reply #3, and ignoring the intervening reply #4. This can be accidental if both people (4 and 5) are replying at the same time. When done intentionally, it can be an insult or a dis to the most recent poster (#4).
LOL bitch, you just got skipquoted!
Oh no you DIDN'T just skipquote me!