Face of the day. The look a person (typically female) has achieved for that day using cosmetics. A FOTD photo is often posted online with a list of makeup items used.
Click this link to see my FOTD! I used Smut in the crease, Fairylite pigment on my browbone, Orgasm blush, Viva Glam V lipglass...
Friend Of The Day.
I.e. someone who is just altogether awesome and you want to associate yourself with for that particular day.
Kind of like Mother's Day or Father's Day,
except 293487234678913465 times better and funner.
Also a Facebook application that chooses one of your friends at random (and tends to be rather accurate).
robot #1: HEY can i be your FOTD on facebook?
robot #2: i'll only post you as my FOTD if you actually are :)