1. chock a block - Adjective
2. chock a block - Adverb
as completely as possible
Source: WordNetchock-a-block
it was chock-a-block full Source: Internet
Built around a maze of narrow, cobble-stepped streets illuminated by Chinese lanterns, the town is chock-a-block with tiny trinket shops and Old World restaurants overlooking the bay far below. Source: Internet
Over the Easter weekend local launching ramps were chock-a-block and anglers were rewarded with excellent fishing conditions. Source: Internet