blow-out n.1
1. [early 19C–1930s] (US) a brawl, a noisy argument.
2. [early 19C+] (also blow) a binge of eating, drinking and debauchery, also drug-taking; also fig. use.
3. attrib. use of sense 2.
4. [early 19C+] a party.
5. [late 19C+] a good time, an exciting event.
6. [1900s] an organized dance, held in a dancehall and frequented by lower-class young people.
7. [1990s] (US prison) a riot.
8. [1990s+] (Aus.) expenditure.