My daughter is quite active and loves her gal pals, could this mean she is a biual?

I'm concerned that my daughter might be a "". She plays for the Hackensak High Softball team, as well as, the basketball team. She is very athletic, but always seems to be spending time with her girl pals instead of the boys. The other day when I was doing some laundry, I found a note in one of her pocket cargo pants that said something like "i love my carpet muncher, Love Sam" (Sam is her best girl pal) They are always paling around together and my daughter always wants Sam to have a sleepover, I'm a little weary about her staying over, could my daughter be a "biual"? And what is a "carpet muncher"?