Nopportunity
A favor someone asks of another person that will not only be of no benefit to them but also degrades their life in some way. These favors are usually asked with a high pitched "happy to see you" sort of tone.
"Hey buddy! (Guy asking a favor teases the other guy's hair like a dog) I've got an opportunity for you! How would you like to come in on Saturday and help me untangle all the paper clips?"
"Sounds more like a Nopportunity" (full sarcasm)
"Sounds more like a Nopportunity" (full sarcasm)