logjam

[ lawg-jam, log- ]
/ ˈlɔgˌdʒæm, ˈlɒg- /

noun

an immovable pileup or tangle of logs, as in a river, causing a blockage.
any blockage or massive accumulation: a logjam of bills before Congress.

Origin of logjam

First recorded in 1880–85; log1 + jam1

British Dictionary definitions for log jam

log jam

noun mainly US and Canadian

blockage caused by the crowding together of a number of logs floating in a river
a deadlock; standstill