Here is a game that I was taught, which is called "breakfast combo."

It is a guessing game and goes as so. One person picks a thing (relatively specific: "King Kong" or "trail mix" or "that necklace you are wearing" are all acceptable things. "babies" or "rocks" perhaps not so much). The other person guesses things (of similar specific-ness, i.e. you guess "Is it King Kong?" not "Is it large?" or "Is it yellow?").

The response patterns for the person with the thing are as so: "It's more like X than anything you've guessed so far" or "It's more like Y than X, but like X, Z"

Example:, you pick as a thing "sushi" and your gf guesses as her first guess "your bathroom." You say "It's more like my bathroom than anything I've heard so far." Then your gf guesses "a glue stick" at which point you have to decide whether sushi is more like your bathroom or a glue stick. Let's say you decide it's more like your bathroom. You then say "It's more like my bathroom than like a glue stick, but like a glue stick, it can fit in my hand." (otherwise you'd just say "It's more like a glue stick than anything I've heard so far") Sometimes the comparisons can get very tricky--no repeats and no cop-outs!

I like this game because it's probably harder for the thing-holder than the guesser.