Definition of heinie in English:

heinie

noun

US
informal
  • A person's buttocks.

    • ‘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.’
    • ‘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.’
    buttocks, behind, backside, rear, rear end, seat, haunches, cheeks
    View synonyms

Origin

1960s: alteration of hinder, variant of hind.

Pronunciation

heinie

/ˈhīnē//ˈhaɪni/