red ball

Short definition from Wiktionary

Noun

1. 1
   A high-profile high-priority case which draws political or media attention.
2. 2
   First-class cricket, as distinct from limited overs cricket (or "white ball". Mainly used to play tests.
3. 3
   Used other than figuratively or idiomatically: see red, ball.

Adjective

1. 1
   Of or related to priority freight or the trains that carry it.