USAFisnumber1
Yes, very.
Athena
Depends on what you do next.
STEVEN F
CONTEXT is CRITICAL. If you lie in a bar as part of a pickup line, it isn't strictly illegal. If you act in a manner that would lead a reasonable person to believe you were an officer, and attempt to exercise the authority of an officer, that is a SERIOUS offense.
Anonymous
IMPERSONATION is FELONY dimwit!!!!
Blocking Back
Probably. If they try to order you to do something then it's definitely a crime. If some guy in a bar says he's a cop when you ask him what he does he probably won't get in trouble.