mdnf

Taking a "massive" dump and not flushing it. Massive Dump, No Flush

I took a MDNF in the CEO’s private bathroom.

by Nathan November 9, 2004

mdnf

the hipster way to say "my dick needs fucking"

often thrown into random conversations

"hey joe whats up"
"MDNF!!!"
"WTF does that mean?!?!"
"oh; you know ;"

by Simpy April 26, 2009