morning glory

noun4

1. •
   Any of several members of the family Convolvulaceae; climbing plants with trumpet shaped flowers.
2. •
   (UK, informal) An involuntary erection present upon waking.

   • What's the story morning glory? Well? / You need a little time to wake up wake up — 1995
3. •
   A rolling cloud in the shape of a cylinder; a roll cloud.
4. •
   A morning bout of love-making.