Wiktionary
liquid courage
n. (context idiomatic English) alcohol drink to induce a feeling of courage in the drinker.
Wikipedia
Liquid Courage (Wax album)
Liquid Courage is Wax's debut album produced entirely by EOM. The album was first released for purchase on CD Baby, then uploaded to iTunes for digital download . The album is described to be experimental hip hop with a pop sensibility with topics include sex, God, alcoholism, love, music,and partying.