sleepfest

sleep fest

1. Some event or situation in which people spend a lot of time sleeping. My son is having some friends over for the night. They're always really rowdy until the early hours, but then it's usually a sleep fest the whole next day.
2. Some event or situation that causes one to fall asleep because it is so boring or unstimulating. This director's work is usually really interesting, but I found his latest film to be a total sleep fest.
See also: fest, sleep
Farlex Dictionary of Idioms.

sleepfest

n. something, such as a dull lecture, that induces a long period of sleep. The history lecture today was a real sleepfest.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • sleep fest
  • snoozefest
  • snorefest
  • donnybrook
  • country drunk
  • on the tiles
  • rack duty
  • hoot (one) down
  • hoot off the stage
  • howl (one) down
References in periodicals archive
Manchester United were similarly slothful and the only winner was the special one, Jose Mourinho, who enjoyed every minute of this sleepfest ONE of Liverpool's most pathetic performances lastseason came at St Andrews.
Len Capeling: How not to use Crouch, example
Manchester United were similarly slothfuland the only winner was the special one, Jose Mourinho, who enjoyed every minute ot this sleepfest ONE of Liverpool's most pathetic performances last season came at St Andrews.
Len Capeling: How not to use Crouch, example