An onomatopoeic adverb meaning sluggishly or lumberingly — slow, heavy movements (often used for large animals or sleepy people).
ゾウがのっそりと歩いていた。
The elephant was lumbering along slowly.
朝、父がのっそり起きてきた。
In the morning, my father got up slowly and sluggishly.
猫がのっそりとソファに寄ってきた。
The cat ploddingly came over to the sofa.
Stolidly or impassively — standing or behaving in a heavy, unruffled manner; showing little reaction.
彼はのっそりとした足取りで舞台に上がった。
He mounted the stage with a slow, heavy step, looking unperturbed.
店主はのっそりとカウンターに立っていた。
The shopkeeper stood at the counter in a slow, stolid manner.
その犬は来客にものっそりと反応しただけだった。
The dog merely reacted slowly and impassively to the visitor.