The Cult of the Snuggie threatens to take over America! Or at least, a substantial number — 4 million — of late-night couch spuds. Fox News even spotted someone wearing a Snuggie in the crowd at President Obama's inauguration.

The oversized fleece blanket with sleeves stars in a ubiquitous TV ad, showing people wearing Snuggies at a sporting event, cheering and high-fiving each other while dressed sort of like medieval monks.

"Every once in a while, a product transcends advertising to become part of pop culture," says Scott Boilen, CEO of Allstar Products Group, which conceived and markets the China-made wrap.

Jay Leno makes fun of them: "Lard-ass quilt was the original name! Why not just put your robe on backwards?" Ellen DeGeneres wore one during her show. Indeed, Snuggies seem to be everywhere. See them on Facebook — nearly 250 groups, pro and con. Watch them on YouTube — nearly 300 parody videos posted, including one titled "The Cult of the Snuggie."