According to corkslang.com, caffler is a noun meaning a young
rogue, an impish,
saucy young fellow, an impertinent boy. It is used around
Cork city in Ireland.
It probably derived from French 'caviller'.
That fellow is a caffler.
' . . . . I rocked that little caffler in his
cradle.' (
Murphy)
'
Young cafflers would come after me along the Mardyke calling me names.' (O'Mahony)