When you don't understand something and you are super pissed.
When you don't feel like saying "fucking understand"
When fucking understand just doesn't quite display the needed emotion.
When you don't feel like saying "fucking understand"
When fucking understand just doesn't quite display the needed emotion.
by Desiree Aho December 24, 2007
underfuckingstand - Understand, with "Fucking" inserted in the middle, making it an exclamation of frustration or, in some cases, a joking statement.
by Steve October 24, 2004
When you don't understand something but you're angry
by raymondamantius August 16, 2019