PTBM 

Stands for "Phish Tickets By Mail"

A non-generic, crisp and beautiful Phish ticket bought straight from the band's mail-order service. These are usually identifiable through their awesomeness and kick-assery on the aesthetics spectrum.

Although PTBM tickets are now only available via Phish's website, the original acronym has withstood these technological advances.

Trading two Alpine lawn tix PTBM for your Deer Creek pavs!

PTBM by TheGreatCurve May 4, 2011

PTBM 

short for "Plain Talk Bad Manners"

A slang that used in the islands of the Caribbean. It is equal to speaking your mind or saying what is on your mind in the U.S.

"ptbm please!"

PTBM by user11 September 24, 2013