A nonsense word, especially in simple or childish songs.
[…] he heard a distant sound, or song, behind him. "Rumpty didily dum. Rumpty dididly doo. Rumpty doo doo dumpty didily rumpty didily dum." 2010, Dawn Dalglish, Jacob's World, page 127:
I sang it through, "Rumpty tumpty toddy man," as Grandpa thumped his blackthorn stick against the floor and everyone laughed. 2009, Patricia Reilly Giff, “chapter 6”, in Nory Ryan's Song:
(New-Zealand) Of a quality below standard; in a state of disrepair.
I lived in a fringe of the city, down Happy Valley Road, in a bit of a rumpty palace of a house banged together by some DIY no-hoper. 2000, Nigel Cox, Skylark Lounge, page 12: