under the arm 

Liverpool slang from the 1960s, possibly earlier, meaning 'bad or terrible'.

"What did you think of that book I lent you?"
"It was under the arm!"

under the arm by Cloonan November 18, 2013

Above the tree, under the arm 

When you get stuck trying to explain something. Not knowing what to say in a conversation.

Someone: “What does that mean?”
Me: “I don’t know, above the tree, under the arm.”

Above the tree, under the arm by Ghanoy December 23, 2018

Zombie Army Under The Sea

While being exported to Fascist Dictatorship Island, a zombie can have many adventures, experiencing all the sights and sounds on the sea floor before being shot out of a cannon to fight for the great Libernazi.

"Blub, blub, blub, brains, blub."

Zombie Army Under The Sea by Fagbot and jessor December 27, 2003