Plastered ['pla:stəd]:
Drunk, wasted.
Examples:
Rick couldn't handle drinking; he was plastered in under an hour.
That chick was so plastered.
Man, I'm so plastered. Let's go home and drink more. He-he-he.

Meaning from the English-Bulgarian dictionary:
Plaster ['pla:stə]:
Plaster, mortar.
Plaster, bandage.
Medical tape, adhesive bandage.
Coat, apply with mortar.
Cover, smear, splash.
Apply plaster/medical tape to, put in a cast, set in plaster.
sl. Shell heavily / Bombard heavily, inflict heavy losses on.
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