Weird Al Yankovic put out a humorous song called "Polka Face" in the same style and melody as Lady Gaga's "Poker Face."

Which satire technique did he use?

Weird Al Yankovic used parody as a satire technique in his song "Polka Face." Parody involves imitating a specific work or artist in a humorous or exaggerated way to critique or comment on the original piece. In this case, he recreated Lady Gaga's "Poker Face" in a polka style to create a humorous take on the original song.