Ultramount = Ultra-Amount, as in an amount of things so ultra, that it could not even exist in this universe because there would be just too many of these things.
Usually afflicting fathers-to-be and men and women who haven't been through pregnancy yet, this is a visual/brain problem that prevents a person from seeing in an ultrasound image where the baby is when it's perfectly obvious to the doctor and pregnant mother-to-be. Sometimes, but always, the pregnant woman will suffer from this affliction as well. You should worry if the doctor has it too.
Doctor: "Aaand there's our little guy!"
Mom: "Awww, he looks so cute! Doesn't he look beautiful, hon?"
Dad: "I-I guess so... Where is he again?"
Doctor: See? That's his hand with his 4 little fingers and thumb and you can also see his fingernails. And if you squint real hard you can see the individual atoms making up his penis."
Mom: "See honey? See his little peenee?"
Dad: "What...? I- don't... Wha...?"
Doctor to Mom: "He must be suffering from ultrasound blindness. Perfectly normal for fathers-to-be and village idiots. He's just not as awesome as you and I."
*both doctor and mom then laugh at dad's expense*
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."