An onomatopoeic adverb describing something flopping or slumping down with a thud, or a large chunk/bulk being present all at once.
じゃがいもを一口ごろっと入れてシチューを作った。
I made stew with a big chunk of potato plopped in at once.
箱の中からごろっと重い物が転がり出てきた。
A heavy item rolled out of the box with a thud.
寝転んだらごろっと体が沈んだ。
When I lay down, my body slumped down with a flop.
Describes heavy rolling or rotating—when something rotates with a heavy, rumbling motion or sound.
古いエンジンがごろっと回り始めた。
The old engine started turning with a heavy rumble.
トラックのタイヤがごろっと路面を転がった。
The truck's tires rolled heavily over the road surface.