Top definition
A cumulonimbus cloud with dry lightning. A firefighter (usually a wildland firefighter) calls this a cumulus overtimus in reference to the overtime that he / she will make if there are down strikes that start a fire.
While standing at the station looking at the clouds or when listening to the weather report that predicts dry lightening.

"It looks like there is a big build up of cumulus overtimus."


"Bring on the cumulus overtimus."
by AlistairMacIlherron September 21, 2009
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug