jam-packed

adj

adj

Etymology From jam + packed.

Informal Packed or filled tightly.

Summer holidays: 'Staycationers' alight at London Paddington from a full train from the West Country. No matter what time of day, the trains are invariably jam-packed when they arrive at a London terminus.2021 December 29, “Our railway from behind the lens...”, in RAIL, number 947, page 38, photo caption:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.