Some funny pickup lines to use on a man are to ask the man if he is Google, because he is everything the woman is searching for and to ask the man if he has been arrested. An additional funny pickup line to use on a man plays on shyness.
A funny pickup line asks the man if he has been arrested, because the woman can then tell the man that it is illegal to look as attractive as the man looks. Alternatively, if the woman is shy, she can tell the man that she knows of a shy person that wants to tell the man that she finds him attractive. This gently broaches the subject and leaves it to the man to respond. If the woman is not shy and if she is a little bit cruel, she can tell the man that she is not the most attractive person in the room but that she is the only woman currently speaking to the man. If the woman wants a funny pickup line that is kind and flattering, she can tell the man that he is hotter than a sunburn.