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.
[1940s] (Aus./N.Z.) used of a drink that is paid for by someone other than the drinker.
1. [late 19C–1900s] to get drunk.
2. [late 19C+] to buy a round of drinks for the whole bar.
SE in slang uses
[1980s+] (US campus) to vomit.
[1980s] (Aus.) to vomit.
[1910s+] to talk loudly, to boast.
an excl. of encouragement.