Charlie Brown's Christmas treed

(/ˈtʃɑːli bɹaʊns ˈkɹɪsməs tɹiːd/)

adj.

Drunk in a way that leaves you undersized, uneven, and nonetheless expected to brighten the sitting room.

Kymera was Charlie Brown's Christmas treed, leaning into the sofa with modest festive dignity.

Source: Wiktionary