'Tumbleweed' is a phrase that Croc uses to describe the strange blowing wind sound, that is heard whenever all is silent in the village. Croc usually tells 'Tumbleweed' to shut up.

Croc first says this phrase in Episode 3 of Series 1, the Murders. Croc says 'Tumbleweed!', before saying his favourite phrase 'Suicide', and before going on about the strange smell of blood. 'Tumbleweed' is told to shut up by Croc in Episode 4, when it is heard twice.