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

2. Manager: "So, Alex, what have you been working on?"
Alex: " Uh.... Not a Cow?"
Manager: "You're fired."
by Lilli the Excellence June 10, 2010
Get the Not a Cow mug.
The word 'cow' is also a moderately offensive insult in the United Kingdom towards a woman who is supremely unpleasant.
"You fat cow!"
by Tequila May 22, 2004
Get the cow mug.
adj.
1.moronic,foolish,clumsy
2.not able to learn because of brian condition
Bush is an on-cow-cow fucka
by sonx May 4, 2005
Get the on-cow-cow mug.
1. A domesticted hooved animal that can be used for meat, leather, milk and miscelanous byproducts.

2. A person with a gigantic ass.

3. The ultimate proof of the axiom "You are what you eat".
Get that cow meat out of your mouth now you freakin' cow!
by Crushyiffdestroy November 7, 2004
Get the cow mug.
A wise creature that understands the three tenants for enlightenment: (1) know the moo; (2) feel the moo; (3) be the moo.
Guy: You're a cow.

Girl: Thanks. I know.
by Ereck Flowers November 8, 2018
Get the cow mug.
Some girl who is being a total bitch, particularyly offensive as it is basically calling them fat, and we know they dont like that.
"You fucking cow"
"Fuck off you cow"
"You cow!"
by Prick #1 January 6, 2005
Get the cow mug.
1. A word that can stand for "Crazy Old Woman."

2. A word to describe a person with a fat ass.

3. A large animal that can be made into beef.

As such, it's a double-whammy as an insult.
1. "My granda has kind of turned into a cow..."

2. Get out of my way, you stupid cow!

3. The cow said "moo."
by Tiger911 January 9, 2009
Get the cow mug.