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' ×××).
But his delight is in the law of the LORD, And in His law he meditates day and night. (Ps 1:1â2). Psalms is a collection of 150 poems written over hundreds of years. Many were originally put to music, and used in the Jewish temples to praise the Lord.