Initialism of fetal blood sampling. / (medicine) Initialism of fasting blood sugar. / Initialism of fetal bovine serum. / (military) Initialism of forward-based system.

(American football) Initialism of Football Bowl Subdivision.

plural of FB

Abbreviation of February.

(Internet) Abbreviation of Facebook.

(soccer) Initialism of fullback. / Initialism of friendship book. / (military) Initialism of firebase. / (military) Initialism of forward base.

Initialism of full-body sensual massage.

plural of FBS