Tickler

Tic′kler

,

Noun.

1.

One who, or that which, tickles.

2.

Something puzzling or difficult.

3.

A book containing a memorandum of notes and debts arranged in the order of their maturity.

[Com. Cant, U. S.]

Bartlett.

4.

A prong used by coopers to extract bungs from casks.

[Eng.]

,

Noun.

One that tickles or pleases.

tickler ‎(plural ticklers)

A person who or thing which amuses, tickles, excites.
A reminder.
Put it in the tickler file for next week.
A latex condom that has additional protrusions, for enhancing the sexual pleasure of the user.
(dated) Something puzzling or difficult; a conundrum.
(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?)
(Britain, dated) A prong used by coopers to extract bungs from casks.