To pay ones respect.

Often used to show respect on the Internet.

Fast and Firm. In the fraternity world it means a term of brotherly love, like sincerely or dear when you are signing off on a letter or email.

It is often used to pay respect online.

Press F to Pay Respects is an action prompt from a quick time event featured in the first-person shooter Call of Duty: Advanced Warfare. Following the game’s release in November 2014, many players mocked the event online for forcing interactivity into the cut scene.

Short for Fuck Thatused mostly around adults

F+ is what you get in school for showing Remarkable Enthusiasm and yet you completed none of the required assignments.