Definition of paddywhack in English:
paddywhack
(also paddywack)
noun
informal
1Chiefly derogatory. An Irishman.
2US informal= "paddy". Now rare.
3A severe beating; a violent blow. Now chiefly nursery.
Origin
Late 18th century. Apparently from paddy + whack, although the semantic motivation for the compound is unclear.
Pronunciation
paddywhack
/ˈpadɪwak/