Definition of "motherfucking"

motherfucking

/ˈmʌðə(ɹ)ˌfʌkɪŋ/

adjective
not comparable
1. (vulgar) An intensifier, used in the same contexts as fucking, but more intense.
  Quotations
  I have had it with these motherfucking snakes on this motherfucking plane!
  2006 August 17, Snakes on a Plane, spoken by Agent Neville Flynn (Samuel L. Jackson)
adverb
not comparable
1. (strongly vulgar) To an extreme degree.