A person or object is described in some way that involves fractions. Oddly, those fractions don't add up to one. The most common form this description takes is "half [one thing], half [another thing], and half [something else]" or extended versions thereof -- hence the name -- but it can also involve more complicated addition problems. Another common variation is to have a character refer to splitting something "fifty-fifty," then realizing there are more people to split it among, and adjusting the proposed split to "fifty-fifty-fifty," etc. Examples: