Looking up...
The old mattress was so lumpy that it made sleeping uncomfortable.
The uneven surface of the mattress caused discomfort while sleeping.
having an uneven or bumpy surface
The road was lumpy after the heavy rain.
The road had many bumps and uneven spots after the rain.
Often used to describe surfaces that are rough or uneven to the touch.
Use 'lumpy' to describe anything with an uneven or bumpy surface, such as a mattress, road, or texture.
From Middle English 'lump' (meaning a mass or swelling) + '-y' (suffix forming adjectives).
Commonly used to describe physical surfaces, textures, or even abstract concepts like a 'lumpy progress' (uneven progress).