What is a citag?

Answer 1

it's another word for "bitch."

This comes from the phone selecting the wrong letters since there are 3 letter possibilities per number typed. The first and fourth letters are entered on a phone using the number 2. So when you hit 2, you can mean an A, a B, or a C. Likewise, the fifth letter of the vulgarity is an H and that requires the same number key as the G, and that's the number 4.