Green’s Dictionary of Slang

shout v.

(Aus./N.Z.)

1. [mid-19C+] to buy a round of drinks (for someone) [one shouts to the publican for drink].

2. [late 19C+] to treat (other than to liquor).

3. [late 19C–1940s] (US) of things, to be undeniably important; of a person, to utter a supposedly important statement.

4. [late 19C+] (US black) to cry out or ‘speak in tongues’, usu. in church, as the apparent result of being possessed by spirits.

In derivatives

shouted (adj.)

[1940s] (Aus./N.Z.) used of a drink that is paid for by someone other than the drinker.

In phrases

shout oneself hoarse (v.) [pun on the actual shouting – to attract attention to one’s generosity and as a result of one’s drunkenness]

1. [late 19C–1900s] to get drunk.

2. [late 19C+] to buy a round of drinks for the whole bar.

SE in slang uses

In phrases

shout at one’s shoes (v.)

[1980s+] (US campus) to vomit.

shout for Ruth (v.) [Ruth = echoic]

[1980s] (Aus.) to vomit.

shout the odds (v.)

[1910s+] to talk loudly, to boast.

In exclamations

now you’re shouting!

an excl. of encouragement.