eff /ef/ euphemistic for fuck, esp in effing (adj) and eff off

• step on it
• step on the gas
• step on the juice
• step out
• step out of line
• step-parent
• step-parenting
• step-parents
• steppe
• stepped
• stepped-index fibre
• stepper
• steppers
• steppes
• stepping
• stepping-stone
• stepping-stones
• step rocket
• step rockets
• steps
• step short
• stepsister
• stepsisters
• step-son
• step stone