Alex Trebek Delivers the Ultimate Burn on 'Jeopardy' -- Watch!

There was no hiding from the TV host's shade on Wednesday night.

Shade for $500…

host Alex Trebek served up the ultimate diss on Wednesday night's episode, when responding to contestant Susan Cole’s favorite genre of music.

WATCH: Meet Buzzy Cohen! The 'Jeopardy!' Champ Knows You Hate Him and He Thinks It's Funny

"I think it's very fun. It's called Nerdcore Hip Hop," Cole described.

"Nerdcore Hip Hop?" Trebek asked.

"Yes, it's people who identify as nerdy, rapping about the things they love: video games, science fiction, having a hard time meeting romantic partners, you know? It's really catchy and fun," Cole elaborated, setting herself up for Trebek's zinger:

"Losers, in other words."

Watch the burn below:

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After a flustered chuckle from Cole, Trebek admitted he was just "teasing."

Cole, however, got the last laugh, beating out the competition and walking away with $22,600.

Trebek may have made fun of Cole's choice in music, but he could use a little schooling himself.

See the longtime Jeopardy host attempt to sing Rihanna's "Umbrella" in the video below.