Serious fast Synonyms

Serious replaced

Definitions for Serious


  • (adjective) not joking or playful in mood or manner
  • (adjective) having a matter of importance as its topic
  • (adjective) involving potential loss or injury

Synonyms for phrase

SF abbreviation

SF is an abbreviation for Serious Fast
What does SF stand for?
SF stands for "Serious Fast"

Fast replaced

Definitions for Fast


  • (adjective) moving, proceeding, or acting with great speed
  • (adjective) firm in one's allegiance to someone or something
  • (adjective) firmly positioned in place and difficult to dislodge