A declaration of friendship or excitement, much like a combination of the uses of "Hey there!" and "Whoa!" and "What's up?"; a pact of silly nature with the intent of showing affability
"Smish Ooble De Gorf!" she shouted to her friend across the cafeteria. He turned with a grin and laughed back. He happily reponded, "Smish Ooble De Gorf!"

"Smish Ooble De Gorf!" he shouted as the bag flew out of his arms, its contents cascading down teh stairs.
by James Cole April 29, 2008
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To organise a nosh and booze fest
. "Franny Smished a cheese n wine event"
by Snowchimp December 11, 2018
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A better version of smash or smush. Generally the compression of soft objects.
This bra smishes my boobs.
by Fairly Local Clique April 30, 2019
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