He was censured by his colleagues in the House but given an “attaboy, Charlie!”
In the ominous silence a cracked voice yelped: "attaboy Fenton!"
It will be observed that Mr. Burke has given his attaboy a "t" too many.
He did go and support the team, and enhance the glory of Zenith, by yelling "attaboy!"
1909, probably from common pronunciation of "that's the boy!" a cheer of encouragement or approval.
An exclamation of approval or encouragement; way to go
[fr that's the boy]