Use 'lumpish' to describe the sluggish feeling following a large meal.

After Eating

'Lumpish' implies low energy or enthusiasm, especially when you're expected to be active.

Lacking Energy

Describes a person's mood when they're not as lively or animated as usual.

Use 'lumpish' to describe objects that are awkwardly heavy and hard to move.

Describes things that look bulky and take up a lot of space.

Often used for furniture that is not sleek or modern, but rather big and unwieldy.