yah
Concise Oxford English Dictionary © 2008 Oxford University Press:
yah1
▶exclamation yes (used in representations of upper-class speech). ▶noun Brit. informal an upper-class person.
Concise Oxford English Dictionary © 2008 Oxford University Press:
yah2
▶exclamation expressing derision.
– origin C17: natural exclamation.
'yah' also found in these Oxford entries:

