Related Clues:

• Packed tightly
• Impenetrable studies before end of course
• Like urban population
• One burrito shy of a combo plate
• Compact; stupid
• Like a pea-soup fog
• Difficult to get through
• Not exactly Mensa material
• Guolaugur Ottarsson: "___ Time"
• Crowd at big show
• Like thick audience
• Like crowd at big show
• Thick crowd
• Like sold-out audience
• Like sold-out show crowd