For this one, you need to activate the Giggity multiball by hitting Quagmire's face in the bottom right of the table, then quickly firing the ball into the hole that gets revealed. You need to do this 3 times to start the multiball.
To do it, you need to wait until the ball is right at the end of your flipper before you fire it off. If you're too early, it'll bounce all over the table. If you go too late, you'll either hit the right bumper or miss it and drain your ball.
I made a video of me unlocking the achievement (after 10 minutes of being awful). If you skip to 12 minutes in, you'll see my technique when I hit the hole for the last time, unlocking the achievement. Just try your best to repeat that 3 times on your own playthrough and you'll unlock it in no time!