2.) V.: To talk abusively and insultingly about someone or something.
3.) V.: To shoot someone with a firearm.
4.) N.: A prefix used in the names of certain snack foods.
He kept popping that shit about my hometown so I kicked his ass.
I popped a cap into his ass for being such a jackoff.
Popcorn and Poprocks are great food to eat.
POP (post office protocol) account is an actual E-mail box located on the server for which the address is made. When E-mail is sent to a real POP account, the mail is stored on the server until the user logs in with their E-mail software and downloads it.