The euthanasic term for "silly ass".
It's used for referring to someone who is extremely silly or just plain ridiculous.
It could also be used to poke fun and tease someone as it assumes that they are ignorant and immature/childish.

also equivalent to "silly goose"
Amy you're such a silly butt, I wish you'd just try new foods - it wont kill you!

Awww, what a little silly butt. He doesn't even know how many days are in a year!
by happygeorgey January 2, 2010
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A compliment about a person or a general mood or feeling one is in.
"I was banging a butt silly last night"
or
"Oh last night at the bar was butt silly"
by Dr. Burgle May 26, 2007
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Ex. 1) Bro, can we pull into that gas station for a minute? I got really bad silly butt.

Ex. 2) Take it easy with that ice cream, Louise, lest you want silly butt.
by Solowin May 13, 2020
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