Where does “Manchvegas” come from?

Manchvegas (English) comes from English Vegas, from English Las Vegas, from Spanish las vegas — the fertile meadows; the meadows.

Ancestry of “Manchvegas”, step by step

Manchvegas traces back through two separate lines of ancestry.

via English Vegas

StepLanguageWordMeaning
1EnglishVegasplural of Vega
2EnglishLas Vegasknown for its large hotels, extravagant entertainment and dining, and gambling
3Spanishlas vegasthe fertile meadows; the meadows

via English manchester

StepLanguageWordMeaning
1EnglishmanchesterA type of cotton fabric, or a piece of clothing...
Every word from Spanish las vegasEvery word from English Las VegasEvery word from English Vegas