Thank Wank - A form of manual sex (stimulation by the hand) given in a gracious display of respect to someone who has done you a favour or otherwise indebted you.
Antonio: Can you get me a discount on this product with your trade account?
Mac: Sure man!
Antonio: Sweet! I owe you a thank wank!
Mac: Awwww yiss!
Noun. The act of engaging in mutual masturbation only, or engage in cybersex, with a partner without actual intercourse taking place.
Verb. To engage solely in mutual masturbation, or engage in cybersex, with a partner and nothing else.
Verb - 1. Imagining something so exciting you achieve orgasm. 2. Fantasizing about something when no other stimuli is available an attempt to achieve orgasm.
I was so bored, I started thinkwanking about what I was going to do to my girl after work.