The act of getting led on, used, or toyed with by a girl who clearly knows you are interested in her. It is not the same as getting friendzoned
because a Tammy does not want to be your friend, she just wants to use you for money, alcohol, parties, drugs, etc.
A true Tammy will pretend to act interested in you, flirt with you, and compliment you to draw you in close in order to gain the best rewards.
"Dude, you see that girl I was with the other night? She's totally hot and totally into me!"
"Bro, you're getting Tammied. She's just using you to find out about parties, get shitfaced
, and go home with other guys."