#bf1

What does "bf1" mean?
battle_for_1st, bambino_forever_143

bf1-6 3276 bf1-5 3590 bf1-2 1730 bf1-7 1376 bf1-09 3989 bf1-3 882 bf1-10 383 bf1-99บาท 615 bf1-60113 409 bf1-943 197 bf1-1 523 bf1-3editcontest 78 bf1-09g 210 bf1-4 897 bf1-00happy 141 bf1-kgiveaway 122 bf1-0in10 151 bf1-2juli 78 bf1-00kcontest foals 100 bf1-302 45 bf1-301 49 bf1-09e3 57 bf1-228 414 bf1-hype 31 bf1-5anos 43 bf1-60122 45 bf1-accgive 55 bf1-3registros 55 bf1-60913 32 bf1-3anniversary 39 bf1-systems 127