chock-a-blockchock-a-block /ˌtʃɒk ə ˈblɒk◂ $ ˈtʃɑːk ə ˌblɑːk/ adjective [not before noun] British English 
Word Origin
Paris was chock-a-block with tourists.
Word OriginWORD ORIGINchock-a-block
ExamplesOrigin:
1800-1900 chock-a-block ‘with the wooden blocks of a tackle (= ropes for lifting) touching each other, so that no more can be lifted’ (1800-1900), from chock on block; influenced by chock-fullEXAMPLES FROM OTHER DICTIONARIES
Thesaurus- Best of all were the three libraries, which were chock-a-block with rare and ancient books.
- At six in the morning the tradesmen's entrance had been chock-a-block with fishermen, and the kitchen resembled Billingsgate.
Longman Language Activatorfull► full
completely full of people or thingschock-a-block with if a container, room, or space is full , nothing more can go into it: · a full bottle of milk· All the parking spaces were full.· The lecture hall was full for MacGowan's talk.full of: · The buses were full of people going to work.· You can order a birthday box full of balloons, banners and party favors.
► filled with something full of something - use this about a container when a lot of things have been put into it: · Pour the mixture into a tall glass filled with ice.· There were lots of tiny drawers filled with screws and nails.
► packed completely full of people - use this about a room, theatre, train, bus etc: · a packed theatre· The plane was packed, because a previous flight had been cancelled.packed with: · On the day of her funeral the church was packed with friends and relatives.
► overflowing a container that is overflowing is so full that the liquid or things inside it come out over the top: · Sewers were overflowing because of the rain.· The tables were covered with dirty coffee cups and overflowing ashtrays.overflowing with: · a trash can overflowing with garbage
► bulging something such as a bag or a pocket that is bulging is so full that the objects inside it push its sides outwards: · Wilson carried two bulging shopping bags from the duty-free shop.· a bulging wallet full of credit cardsbulging with: · The files are bulging with letters, mailing lists, and information on the subject.
► be full to the brim British /be filled to the brim American if a container is full to the brim , it is full right to the very top, especially with liquid: · The reservoirs are filled to the brim after the spring floods.be full to the brim with: · The sink was full to the brim with dirty water and dishes.
► be chock-a-block British informal a room, vehicle, or building that is chock-a-block is so full of people that you cannot move easily in it: · The train was chock-a-block and I couldn't get a seat for the whole journey.be chock-a-block with: · The cinema is usually chock-a-block with kids on Sunday afternoons.
► crammed/jammed so full of things that nothing else can possibly be put in: · How can children learn in crammed classrooms?crammed/jammed with: · The box was crammed with books.· O'Hare Airport was jammed with holiday flights.· The two resorts are crammed with hotels, discos, bars, and restaurants.
► be stuffed with if a container is stuffed with things, it is very full of them because as much as possible has been put into it: · a huge picnic basket stuffed with food· The girls each had a small backpack stuffed with books, cards, crayons, paper, and games.· Police seized the plane and found bags stuffed with 1300 kilos of cocaine.
Paris was chock-a-block with tourists.