Smack dat tater is a phrase used by the gay population to find out if another person is gay.
For example: if a man were to say to another man "smack dat tater" the gay man would say "smack dat tater" in return to say that he is also gay.
Hey man.
So I need to ask you something
Ok
Smack dat tater
Smack dat tater
Ok do you want to go out