Trundle, per Microsoft search — [verb] to move or cause to move slowly and heavily, typically in a noisy or uneven way. Or, per Wiktionary, — [noun] a low bed on wheels that can be rolled underneath another.
As a child, I always thought a trundle bed would be fun (although I did rather imagine being rolled under the big bed to actually sleep there, which would probably be logistically impossible or, at the very least, uncomfortable). But the wonderful state of childhood allows for such joyous flights into fantasies where all is possible! But now…many years later…I need to trundle myself slowly and heavily (and noisily — “ouch!”, “creak!”) up the stairs to bed.