(slang) Extremely fatigued. / (slang) Deeply asleep. / (slang) Drunk.

present participle of zonk

(slang) Striking; great.

Third-person singular simple present indicative form of zonk

(slang) An unfavorable card or token, or undesirable or worthless item used as a prize in a contest or game show (such as Let's Make a Deal). / (slang) The feeling of a drug taking hold.

(transitive, slang) To hit hard . / (transitive, slang) To make (someone) sleepy or delirious, to put into a stupor .

(slang, idiomatic) To fall suddenly into a very deep sleep.

(rare) The quality of being zonked.