aufschneiden

Etymology
From, equivalent to. Compare 🇨🇬, 🇨🇬. The sense “to brag” apparently figuratively from “to cut food for serving” (so as to show one’s opulence).

Verb

 * 1)  to cut open
 * 2)  to cut (food, e.g. bread or ham) into slices or pieces suitable for serving
 * 3)  to brag; to exaggerate one’s talents or achievements