Tach

//tæk// noun, slang

noun, slang ·Moderate ·College level

Definitions

Noun
  1. 1
    Clipping of tachometer. abbreviation, alt-of, clipping, informal
  2. 2
    A hat. obsolete

    "I have a rorty gal, also a knowing pal, / And merrily together we jog on, / I doesn't care a flatch, as long as I've a tach, / Some pannum for my chest, and a tog on."

  3. 3
    Tachycardia. colloquial, uncountable

    "wide-complex tach"

  4. 4
    measuring instrument for indicating speed of rotation wordnet

Synonyms

All synonyms
tachometertachometer

Example

More examples

"I have a rorty gal, also a knowing pal, / And merrily together we jog on, / I doesn't care a flatch, as long as I've a tach, / Some pannum for my chest, and a tog on."

Etymology

Etymology 1

Clipping of tachometer.

Etymology 2

Backslang for hat (with /tʃ/ substituted for the /h/).

Related phrases

tach upv-tach

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.