Discussion Forum—A Way with Words, a fun radio show and podcast about language

Hello,
My dad (now deceased) was born in 1900 in central Kansas of Irish immigrant parents. When I was a child he would sometimes utter the phrase,
"dus der flum du cease to gross a mulligan a showbuck" (or something like that). Does anyone have any idea what this means or where it might have come from? My grandson
now prides himself on being able to say it.