a "hand shake" given to a male by an uffy. the "hand shake" takes place in the male nether region. it is given when an uffy wants to determine if the male is suitable or large enough for bedding.
uffy hand shake originated when muffy, buffy, and fluffy noticed that a man can see if a woman has large breasts. and the man can decide if he wants to go out with her. but a female has no way of knowing if a man has a big one or not. hence the need for an uffy hand shake.
"fluffy, did you give gary the uffy hand shake before you had sex?", asked muffy.
"yes, and he had a prince albert too!"
duffy was so sad and bummed out that biff had a small wanker.
"hey duffy, you should have given him the uffy hand shake."