The word chockablock [chok-uh-blok] is an adjective meaning "crowded or extremely full". (It can also be used as an adverb meaning "in a crowded manner".) I like saying chockablock over and over again -- the sound reminds me of someone playing a drum or other percussion instrument. Here are some examples of the word in a sentence:
What images come to your mind when you think about the word chockablock?
The boys' bedroom floor is an obstacle course,
chockablock with toys and treasures they've brought home.
All of our shelves are crammed chockablock with books.
Every time I close my eyes and try to rest,
my brain -- chockablock with ideas -- won't let me.