There are 3 main definitions of tush in English:

tush1

Syllabification: tush
Pronunciation: /təSH
 
/

exclamation

archaic or humorous

Origin

natural utterance: first recorded in late Middle English.

Definition of tush in:

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There are 3 main definitions of tush in English:

tush2

Syllabification: tush
Pronunciation: /təSH
 
/

noun

1A long pointed tooth, in particular a canine tooth of a male horse.

Origin

Old English tusc (see tusk).

Definition of tush in:

There are 3 main definitions of tush in English:

tush3

Syllabification: tush
Pronunciation: /to͝oSH
 
/

noun

informal , chiefly North American
A person’s buttocks.

Origin

1960s (as tushie): from Yiddish tokhes, from Hebrew taḥaṯ 'beneath'.

Definition of tush in: