chained_bear commented on the word mackerel-snapper I get the fish-eater thing, but I don't know why non-Catholics wouldn't want mackerel--evidenced by the use of the term in a disparaging phrase. (Or wouldn't want snapper, for that matter.)
Psalm 1 is the first of the Psalms in the Hebrew Bible. Like many of the psalms, it contrasts the  righteous  person (tzadik ×¦×××§) to the wicked or ungodly (rasha` ×¨×©×¢) or the  sinner  (chatta' ×××).
The title to Psalm 90, for example, is âA prayer of Moses the man of God.â Obviously Moses penned the words to that psalm. Psalm 91, however, has no title, so we are not able to identify the author that way. If the psalm has no title to identify the writer, there is a second way to discover who that person was.