(n) A person who never has any money and/or is constantly broke. Yet, this person never has any problem with always asking you to lend him/her some cash. The biggest problem they have is paying you back on time, if ever.
These people are the object of both pity and utter disdain by many.
"You can kiss that $20 you let Ed borrow goodbye. He's a real charitycase."
Wiping your butt minutes or hours after the offending dump has been taken. Sometimes necessary when the offending dump has been particularly greasy and you can't be sure you got completely clean during the intial wipe.
I took a dump an hour ago that was so greasy that now I have to do a charity wipe.
An orgasm which is given out of an uncomfortable sense of duty; much like parting with small change when confronted with a bucket shaking Salvation Army worker. You don't want to give it, but you'll be made to feel a total shit if you don't.
Here is a typical example of a circumstance that requires such a donation. Your partner has been moaning all the livelong day about their appearance. Words like "obese", "disgusting", "hideous" and "gross" have been used so often and so emphatically that, despite yourself, you genuinely begin to agree. Then the obligatory "You're so gorgeous, I can't keep my hands off you" sex that was meant to assure them they're hot has become an act of charity, with you performing deeds that you would rather not share with someone who has half convinced you they're a troll.
He closed his eyes and thought of Beyoncé whilst making his charity orgasm donation to his long term "fat", "rancid" and "skanky" girlfriend.