1. Texting in a way that makes it obvious that one is or has been unkin', meaning using illegal or prescription drugs and subsequently acting stupid or high.
2. Denying that one is unkin'.
1. "Dude i just got a text from Christine. This is what is says: 'U wur mor breengen dan u kn00w!!!111 p0wnnd h4xr@!!!'
Sounds to me like she's tunckstin''
2. "I am not, nor have i ever been unkin'!'
"Baby, you's is just tunckstin' now."