When one dude gives another dude a friendly hand-job as a form of thank you or kudos. This is not a sexual act by any means, more just a pleasnt gesture - similar to the tradition of giving of a box of Roses chocolates.
Nige: Bish helped me move house today, so I gave him a Box of Roses as a thank you.
Rusty: What a fantastic and totally non gay way of saying thank you! I bet Bish felt appreciated.