Anything that is not a cow. It is sometimes used for tags when you can't think of anything else to put in. Also, It can be used for answering a question that you don't know the answer to.
1. TAGS: Carrot, pie, elf, lichen, omelette, Not a Cow
Phrase usually used to describe a sub-standard football player whose shooting ability leaves a lot to be desired.A variation on the classic phrase:"Couldn't hit a barn door from 10 paces".