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1.
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
by I am the Hulk November 02, 2009
 
2.
To run, but to do so in a clumsey and stupid manner.
Matt galumped down the stairs.
by Danny Paps October 08, 2003
 
3.
n. gurgling sound

v. make deep bubbling noise that liquid makes when it is poured from a bottle
Galump went the little green frog.
by Eddie March 27, 2004