Definitions by KyGuy On Youtube

Across the 2nd dimension 

Referring to the Film, Phineas and Ferb Across the 2nd dimension.

Very Painfully/Far

"You're Ugly"
"I will slap you across the 2nd dimension."

"I threw that ball across the 2nd dimension!"

Across the 2nd dimension by KyGuy On Youtube September 17, 2019