To make an assumption like an idiot or moron (a word blending of presume and numpty). Anything bad arising from this false assumption is known as a presumptling.
I'm such an tool, I presumptled the big dude with who waved me over to the dark alleyway just wanted directions. He gave me such a presumptling...
by emptybee August 20, 2012
Get the presumptlemug.