Definition of heinie in English:

heinie

noun

US
informal
  • A person's buttocks.

    • ‘Was the sight of my heinie offensive only to the female eye?’
    • ‘To this end, they plan a study where a group of objective observers rate the aesthetics of 500 adult heinies.’
    • ‘He then asked curiously why they always ended up having to go look for the ghosts and get chased while the other characters sat on their heinies.’
    buttocks, behind, backside, rear, rear end, seat, haunches, cheeks
    View synonyms

Origin

1960s: alteration of hinder, variant of hind.

Pronunciation

heinie

/ˈhʌɪni/