(North America, colloquial) That is all; only, just and nothing more.
2011, Helen DeWitt, Lightning Rods, And Other Stories 2013, p. 128:
No comments yet — say something.
Add your own interpretation of "is all".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.