tickler

tickle +‎ -er

tickler (plural ticklers)

1. A person who or thing which amuses, tickles, excites.
2. A reminder.

   Put it in the tickler file for next week.

3. A latex condom that has additional protrusions, for enhancing the sexual pleasure of the user.
4. (dated) Something puzzling or difficult; a conundrum.
5. (US, dated, slang, business) A book containing a memorandum of notes and debts arranged in the order of their maturity.

   (Can we find and add a quotation of Bartlett to this entry?)

6. (Britain, dated) A prong used by coopers to extract bungs from casks.
7. (dated) A dram of spirits.

• (condom): French tickler

• trickle