A combination between probably and possibly, used to indicate the likelihood of an event or decision, more than possibly but less than probably.
Are you going to clean the toilet? Prosably, because I know it needs to be done, but it'll only get filthy again.
by Pareeha2 May 07, 2006
A combination of the words possible and probably. A balance between uncertainty and a strong confidence.
I am prosably the smartest person alive
by siraction December 26, 2015