jot something down Definition

jot
noun

1. The least bit.

Example: not a jot of sympathy
Thesaurus: scrap, trace, trifle, bit, detail, fraction, grain, iota, mite, morsel, particle, atom, scintilla, smidgen, speck.

verb

jotted, jotting
1. Now only in phrases below.

Etymology: 16c: from iota the Greek letter i, the smallest letter in the Greek alphabet.

Phrasal Verb: jot something down

To write it down hastily.