What is Monkey Tongue?
1.
a standard "dick trick" ie, genital origami.
one puts ones "member" between his legs so that it petrudes enough to be see from behind thereby giving the appearance of a monkeys tongue
jim: and then i put this bit there and HEY PRESTO! grandma, thats the monkeys' tongue!
Grandma: he must really like me i think he is winking.