1. "He went galumphing back." (Lewis Carroll, "Through the Looking-glass and WhatAlice Found There")
2. The little kid went galumphing to his mother to show her something.
Galump is angel delight. Originally strawberry flavoured, the term is now used for virtually all flavoured. The best galump has sprinkles/hundreds and thousands on top.
Patrick: Hey Rhian, are you going to finish that Galump?
Rhian: Hell yeah. Its butterscotch with hundreds and thousands on top.
Patrick: Balls