Fitfap
To intentionally or unintentionally wear one's Fitbit device while masturbating aka Fap resulting in the measurement of one's masturbation session(s) in terms of distance.
Rhonda returned home from her morning run after which she spent the next two hours laying in bed watching porn and fapping herself to glorious orgasm after orgasm. She forget she had left her Fitbit on and realized she had just Fitfaped the equivalent of almost 4.5 miles.