Definition of "clunky"

At a time when Mr. Cameron is being squeezed from both sides — from the right by members of his own party and by the anti-immigrant, anti-Europe U.K. Independence Party, and from the left by his Liberal Democrat coalition partners — the move seemed uncharacteristically clunky.

2013 May 23, Sarah Lyall, “British Leader’s Liberal Turn Sets Off a Rebellion in His Party”, in New York Times‎, retrieved 29 May 2013

You might find yourself listening to the sound your car door makes when it shuts. Is it a cheap tinny sound or a strong clunky sound like the VW?

2012, Mike Brent, Fiona Dent, The Leader's Guide to Influence