Throughout the game you earn FIFA CLUB CREDITS, abbreviate FCC and you'll see your total in the top right of the screen. To get this achievement just got to the main menu, then tab over with RB to "FOOTBALL CLUB".
You earn the first unlock at level 1 and only need 100 FCC (I am brand new to the game and earned 2000 by level 5).
Just select the Muevelo Goal Celebration from the top of the Gameplay tab and the achievement is yours. Leave a comment if part of this is unclear...like I said, I'm a FIFA newb.