tush1
 
/
tʌʃ/
exclam.
 archaic or 
humorous expressing disapproval, impatience, or dismissal.
Etymology
natural utterance: first recorded in ME.
tush2
 
/
tʌʃ/
n.
 a long pointed tooth, in particular a canine tooth of a male horse.
Etymology
OE tusc (cf. tusk).
tush3
 
/
tʊʃ/
n.
 (pl. tushes or tushies)
 informal, chiefly N. Amer. a person's buttocks.
Etymology
1960s (as tushy): from Yiddish tokhes, from Heb. taḥaṯ ‘beneath’.