jam-up

jam–up

noun

Definition of JAM-UP

a crowded mass (as of cars) that impedes or blocks movement <knowing that there was a big traffic jam-up ahead, we took the detour that the locals always use>

Synonyms backup, bottleneck, jam-up, logjam, snarl, tailback [British], tie-up

Related Words tangle; gridlock, lock; congestion, traffic; crawl, delay, slowdown, stoppage