(medicine) Clipping of パスタ剤 (pasuta-zai, “a fat- or oil-based medicinal salve, ointment, or balm”).

pasta

to use / to employ / to make use of, to apply / to spend

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

sauce (liquid condiment) / Worcestershire sauce

source / (programming) source code

What? What did you say?

whatchamacallit, X

source code

a cocktail sauce