Screaming Glass 

A drinking vessel into which an inebriated individual howls vociferously into in order to produce a variety of sounds. The glass may be moved in such a manner to change pitch or tone, or to add tremolo or vibrato.

Brett drained his Duvel tulip in order to use it as a screaming glass before snorting flecks of Goldschlager off of the bar.

Screaming Glass by mcmike101 August 10, 2009