Existing in a variety of forms, the quatrain appears in poems from the poetic traditions of various ancient civilizations including Ancient India, Ancient Greece, Ancient Rome, and China; and, continues into the 21st century, where it is seen in works published in many languages.
I always thought that Mgr. refers to a manager and that's what you find in dictionaries as well. People in Czech use it to stress the fact they are the boss:) Magistr does apply to Master, as in Master's degree, and short versions are M, MAS, or mstr.
The noun CZECH has 3 senses: 1. a native of inhabitant of the Czech Republic. 2. a native or inhabitant of the former republic of Czechoslovakia. 3. the Slavic language of Czechs. Familiarity information: CZECH used as a noun is uncommon.