Donald Sizemore’s technique for fighting pushy telemarketers sure fits the bill.

Like many Americans, this Alabama man is sick of the constant interruptions to his daily life — so he used a quacky talent to get some lighthearted revenge.

“Hewhoah? Hewwwwhoooooah, are you dhere?” a deadpan Sizemore, 77, employing a pitch-perfect Donald Duck voice, is heard saying to a seemingly taken-aback telemarketer. “Dhis is Dawnald Sizemoah, who are you?”

When the caller claims he’s being contacted about “litigation,” Sizemore quips, “Ohhhh, doah, am I in tawubble?”

The rest is viral video history.

Sizemore first discovered his vocal talent as a kid. His wife, Gayle Sizemore, 73, captured the rollicking robocall encounter in a video that’s since racked up more than 8,658,765 views and nearly 300,000 shares on Facebook.

Gayle — who was serenaded with a ducky rendition of “I Love You Truly” on her 50th wedding anniversary — said she had no intention of creating a viral sensation.

“Oh my goodness no,” she told WJLA Sunday. “I posted it on my [private] Facebook and both of my daughters called me dying laughing, begging me to make it public so they could share it on their Facebook. They never dreamed of this either. They just wanted to share their funny dad with their friends.”

Check out Sizemore’s fowl version of “Happy Birthday” below: