Green’s Dictionary of Slang

1. the best, the ultimate.

1957		M. Shulman Rally Round the Flag, Boys! (1959) 217: This is the endsville!
1960		R.F. Bauerle ‘Misc.’ in AS XXXV:4 313: He’s the end from Endsville.
1961		R.A. Norton Through Beatnik Eyeballs 21: She give me a smile from Endsville.
1969		Time 21 Nov. 46: At the wind-up of his two-week tour, Soviet Cosmonaut Georgy Beregovoy announced that New York was strictly Endsville.

2. the limit, the end, as far as one can go, death.

1960		‘Lord Buckley’ Hiparama of the Classics 15: It is for us the swingin’ to pick up the dues of these departed Studs and fly it through to Endsville!
1961		F. Kohner Gidget Goes Hawaiian 18: It’s grim enough if you yourself feel like Endsville.
2000		(con. 1940s–60s) Décharné Straight from the Fridge Dad 62: Fly it through to endsville Bring it to a conclusion.
2002		M. Schoonover I Am Not Afraid 205: One man described the Triangle as ‘endsville’—where did the city expect him to go now, into the East River?

3. absolute, irretrievable failure.

2004

M. Johns Moment of Grace 28: You can be the most artistically perfect performer in the world, but an audience is like a broad—if you’re indifferent, Endsville!

4. of a place, out-of-the-way, without quality, thus ext. east of Endsville.

1959		W. Brown Teen-Age Mafia 15: This jerk came straight from endsville where there wasn’t any more.
1971		N. Armfelt Catching Up 243: To them Waitapa was an Endsville in the Wop-wops.
1975		S. Minot Crossings 93: The only taboo he considered holy was not crossing back over to New Jersey where he had relatives—that was east of Endsville, man.
1997		M. Laurence Sel. Letters 277: Jocelyn thinks Perm is Endsville, which indeed it is, but at the same time it gives her a place to escape from and also to return to, sometimes.
2004		B. Gilbert Natural Coincidence 80: Michigan, is a synonym for Endsville, USA— the middest of the Midwest, the dullest of the dull, squarest of the square.