(statistics, probability) A probability distribution of the ratio of two variables, each with a chi-square distribution; used in analysis of variance, especially in the significance testing of a correlation coefficient (R squared).

(euphemistic) fuck off.

(euphemistic) fuck off.

Censored spelling of fucker.

Censored spelling of fucking.

Censored spelling of fucking.

Censored spelling of fuckhead.

Abbreviation of Federal Supplement, an extension to a federal case reporter.

(aviation) Initialism of first officer. / (military, aviation) Abbreviation of flying officer.

plural of f***er