Adjourned game : Tournament game not completed in one session.
Blitz Finish : final moves of game are decided by clock flagfall. ( Nowadays all clocks are digital).
Castle : Non- chess player's name for rook; experienced players use the word only to describe the casting process.
Castling long : Castling on the queen's side (0-0-0)
Castling short : Castling on the king's side(0-0).
Cheapo : A trap.
Check : Attack on the King, which need not be verbally announced. A player whose king is in check must get out of check at once.
Checkmate : When a king cannot escape from check.
Double pawns: Two pawns of the same color standing on the same file. Diagonal : slanting row of squares of the same color.
Elo rating : A rating on the international scale., whose statistical principles were worked -out by Professor Arpad E Elo of Milwaukee.
Endgame(or ending). when few pieces remain on the board.
Game : Single encounter between two players.
GM: Grandmaster; title awarded by Fide for very good international results.
Grade : performance figures based on results in the previous year.
***FIDE : The world chess ruling body to which over 100/countries are affiliated.
Thanks for posting. Generally, I forget these terms very easily. Now instead of using Google, Bing, or consulting a physical chess book, I can now forever archive this post. I will say that the lack of spacing or organization really helps me.