When a guy is having a phone or internet conversation whilst half-heartedly having a wank. The case may be that he is more interested in wanking than having the conversation. Frequently happens during phone sex/cybersex.
When you see someone hot, you put their memory in your wank tank so that when you have a wank later it is the face you see as you cum all over your bed
Chris was so turned on by the sight of James bending over the photocopier he decided to ut him is his wank tank for lunchtime when he went to the toilet
A booth that you get in places in amsterdam where u sit in it and watch a ladie dance naked while you wank and watch her.
Me -hey john?
john - What?
Me - I was in one of those wank tank thingys whilst i was over amsterdam john - Dad i dont want too know what u done in amsterdam!!