What is Thyuck?
A girl who is a more intense form of thick. Usually a girl with large thighs leading into a phat booty,or just a large girl in general It can be used for as positive and negative connotation. Ment to be drawn out and pronounced with excessive spit, sometimes even replacing the TH with an F to produce more saliva.
Damn look at the booty on that trick. She is thyuck.