When installing a program onto your computer it sometimes takes a ridiculous amount of time to do it, or it takes ages and then does it all at once - a bit like constipation.
Ronald: Hey Jeremy, flight simulators is taking the piss to install, fuck it, i dont want to play that shit game anyway.

Jeremy: Hmm looks like you had a classic case of installation constipation there mate. Why the fuck did you want to play that anyway you complete bell.
by Nedmundovich April 5, 2009
Get the Installation Constipation mug.