The term 'Crowd German' refers to a type of German language spoken by large groups of people. The three crossword solutions for this term are MOB (3 letters), TRE (3 letters), and EXTRA (5 letters). MOB is an abbreviation for 'MOBILE, ' which in this context refers to the fact that Crowd German is spoken by people who are constantly on the move. TRE is an abbreviation for 'treffen, ' which means 'to meet' in German, indicating that Crowd German is spoken when people come together. Finally, EXTRA is an abbreviation for 'extrem, ' which means 'EXTREME' in German, suggesting that Crowd German is spoken in EXTREME situations.