high tide

noun5

1. •
   The natural tide at its highest level for a particular tidal cycle at a certain place.
2. •
   The time of day when the sea has risen to its highest level.

   • They say the sun comes up every morning / And if you listen oh so carefully / The winds that ride on the high tide / Whistles a melody — 1969
3. •
   (figurative) A climax, culminating point or phase.
4. •
   (euphemistic) Synonym of menstruation.

   • Do you not like Aunt Irma? I've got an aunt like that. It's my term for... my time of the month. What time of the month? The weekend? No... you know, it... it's high tide. But we're not on the coast. — 2006
5. •
   (no longer used, rare) A great festival.