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2.
closing to blog or journal entries of an overall insignificant nature; used in the context of making a big announcement that winds up being something of little or no importance. Can also be used to conclude short, spontaneous, even non-sequitur blog or journal posts.
Adam's post in LiveJournal:
"I just tilted my head back and squeezed a good sized squeezeful of ketchup into my mouth.

That is all."
by Kevin Esmeier September 30, 2007
 
1.
What Darth Vader says when you have outstayed your welcome, or he wants you to leave.
"That is all"
by kymcleod October 16, 2003
 
3.
Pithy dismissal of all attempts to continue engagement in conversation, online posting, flaming, trolling, etc.
Rational poster: <List of points as to why flamer is a tool>. That is all.

Flamer: <Weak attempt at continuing to argue, change the topic, bait and switch, etc.>

Flamer: Wait, I'm not done with you yet!

Flamer: Your silence just shows you know I'm right!

etc, etc, ad infinitum/nauseam

Also, it was the closing line in M*A*S*H years before it was uttered by Darth Vader: P.A. Announcer: (clears his throat) Attention. Tonight's movie has been "M*A*S*H." Follow the zany antics of our combat surgeons as they cut and stitch their way along the front lines, operating as bombs and bullets burst around them; snatching laughs and love between amputaions and penicillin.
Colonel Blake: (Watches as a jeep rolls away) Did Hawkeye steal that jeep?
Radar: No, sir. That's the one he came in.
Colonel Blake: Oh, very good. Come along, my dear.
(He and Lt. Leslie leave)
P.A. Announcer: Follow Hawkeye, Trapper, Duke, Dago Red, Painless, Radar, Hot Lips, Dish and Staff Seargeant Vollmer as they put our boys back together again.
SSgt. Gorman: Goddamn army.
P.A. Announcer: That is all.
(a gong sounds and the screen suddenly goes black. End of movie)
by DanDaWriter April 11, 2012
 
4.
It's all done.
That is all.
by Kill Debbie Sweeney October 16, 2003
 
5.
Something said to let somone know that their company is no longer needed......
Thanks for the blow-job bitch....that is all.
by bradrel October 16, 2003