Awkwardly heavy or unwieldy in design or construction. The clunky old computer took up most of the desk space.
Lacking grace or elegance; awkward or cumbersome. Her clunky dance moves made everyone laugh at the party.
Inefficient or difficult to use, often due to being outdated or poorly designed. The clunky interface of the software made it hard to navigate.
Characterized by or producing dull, heavy, metallic sounds. The washing machine became noisy, emitting a clunky thud with every spin cycle.