gwop

The story

1. Spanish · borrowed fromguapo
2. English todaygwop

Uncertain. May be a dialectal pronunciation of Spanish guapo used as a noun, thus being a doublet of wop. The attestation of the aforementioned term in English as guapo in the same sense may likely be a secondary interpretation, cf. buckaroo meaning buck (“dollar”). The acronym of George Washington on paper is likely a backronym.