When it's spring time and a man's testicles are still filled up with semen from the previous season, he's ought to do a spring cleaning. (Basically: he really needs to shag because he's been lazy all winter)
The act of spring cleaning refers to mass deleting and/or blocking of people on social media, specifically on your Facebook friends list. Primarily, because you have no interaction and/or they have not contacted you over a period of time.
when your on facebook, and a family member or someone older than you who you would not want to see something bad on your profile, so you do some facebook spring cleaning. it is when you clean up your profile and delete or hide all the bad bumper stickers, applications, wall posts,pictures,videos,ect
the act of removing "friends" from your Facebook account every spring due to them not being your friend. Every school year leads to a build up of people on your Facebook account that you don't really know nor like, leading to an end year "purge" event known as Facebook spring cleaning.