A phrase used to describe an uncomfortable/awkward situation. (Must be said loud enough so everyone can hear you and must be said TOTALLY exaggerated.)

"HAAAAAPPPPYYY PROOOOOM!"

If something is REALLY awkward you may inject FUCKING between Happy and Prom which would be...

HAAAAAPPPY FUCKING PROOOM

This refers to the fact that High School Prom was/is the most awkward experience of anyones high school career and will leave you with scars/memories you will never forget.
Happy Prom:
"Oh sorry I didn't mean to walk in on you while you were taking a shit.....HAAAAPPPPYY PRRROOOMM!

OR

"Congratulations on your pregnancy!"

"Im not pregnant"

"Oh...sorry......HAAAPPPY FUUUUCKKING PROOOOMM!"
by OOOHHHSHOOT! January 15, 2010
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