großkotzig

Etymology
According to the Kluge, the word is first attested in Berlin's 19th c. as an adjective synonymous with 'he who wins a pissing contest'.

According to the Duden, the substantive came first and out of 🇨🇬, derived in turn from, of uncertain etymology but perhaps related to  in the sense of 'end of the chain of command in the army'.

Adjective

 * 1) exaggeratedly generous