The itis like feeling one has when walking long distances and eating a meal that doesn't quite satisfy ones hunger.
Joe: Man I just walked like 3 blocks and had a meal but wasn't 100% full, why I am so tired???
Dave: Do you have the same symptoms as itis but from walking and eating?
Joe: Yes
Dave: You Sir have walkitis!
When you don't have time for the full on internet porn, box of tissues masturbation session. Wankitas often occur in last few minutes of a morning shower or on the toilet with just seconds to finish off before getting busted.
Jenny called and said she was a coupleblocks away so I only had time for a wankita in the dunny.