Some common physically characteristics include: Small body, short height, hair coloring similar to that of the rodent, fast metabolism, sharper than average teeth and nails.
Prone to excessive biting.
Gets upset when name is misspelled.
Andy: We didn't order these.
Bartender: They're from the two ladies over there.
(Points to two 10 year old girls)
Andy: Dude, nice! Thank you, ladies.
Bartender: Watchout, they're gerbils.
Bartender: Yeah, The opposite of cougars.