preloading       
noun [ U ]  informal (also pre-loading) uk/ˌpriːˈləʊ.dɪŋ/ us/ˌpriːˈloʊ.dɪŋ/
 (指外出之前在家)喝热身酒,预喝酒
the activity of drinking alcohol at your or someone else's home before going out somewhere else
  The report suggests ways to tackle preloading by young clubbers. 这份报告针对去夜总会的年轻人喝热身酒的问题提出了一些建议。 
 - More examples
 - There has been a marked rise in "pre-loading", where drinkers, young adults mostly, buy booze and down it at home before heading to a club or bar.
 - A big trend is to consumption at home before going out, which we call pre-loading.
 - They called for stricter controls on sales to minors to curb ''preloading''.