GREP

Command: #grep [page] {search string}

         This command allows you to search for matching lines in your scroll
         back buffer. The amount of matches shown equals your screen size. If
         you want to search back further use the optional page number. You can
         use wildcards for better search results. Be aware the search string
         is case sensitive, which can be disabled by using %i.

         By default grep searches from the end of the scrollback buffer to the
         beginning, this can be reversed by using a negative page number.

Example: #grep Bubba tells you
         This will show all occasions where bubba tells you something.

Related: buffer, echo and showme.