first post

10 LETTERS · STARTS WITH F

first post is a valid 10-letter word worth 14 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4I1R1S1T1P3O1S1T1

4 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 =14 PTS

DOUBLE WORD → 28TRIPLE WORD → 42

MEANING

What does first post mean?