Today´s daily challenge is an expression that comes from British English. CHOCKABLOCK (adj) - something very busy, crowded, filled with people. "The bus was absolutely chockablock so I couldn´t get on." "For some reason, the shopping mall is chockablock today. Is there a sale on?" "I hate commuting in London - the subway is always chockablock." Did you know this expression? Can you think of an example of something that is chockablock in your city?