Green’s Dictionary of Slang

dead adv.

also dead-ahead
[note dead adj., complete, utter, is SE]

[17C+] a general intensifier, very, extremely, absolutely, completely.

In compounds

dead-bang

see separate entry.

deadbeat

see separate entries.

dead hook (n.)

[late 19C] (Aus.) a certainty.

In phrases

dead broke (adj.) [broke adj.1 (1)]

[mid-19C+] (orig. US) completely without funds; also as v. to impoverish.

dead chocker (adj.) (also dead chokka) [chocker adj.]

[1950s] (orig. milit.) very bored.

dead loads (n.) [loads of n.]

[mid-19C+] (US) many, a great quantity.

dead nuts (adj.)

see separate entry.

dead on (adj.)

see separate entry.

dead set

see separate entries.

dead thick (adj.) [ironic reversal of thick adj. (1a)]

[late 19C+] (UK, Glasgow) very clever.

dead to rights (adv.)

see separate entry.

dead to the curb (adv.)

[1950s] (US black) completely, utterly, comprehensively.