Jake daydreaming about Laura.
A name that ALF calls Jake when he is daydreaming about Laura. ALF also refers to Jake as J-K-L-M-N-O-P while he is daydreaming,
Jake of Diamonds is a reference to the Jack of Diamonds, one of the four Jack cards found in a standard poker deck. The others are the Jack of Hearts, Jack of Spades, and Jack of Clubs.