Top definition
An expression used when green radioactive birds tell you that you are getting too loud.
Origin: Mrs. Bolick's 7th graders at MRSA
Rachel and Girish often play rock, paper, scissors over who said "bird says stfu" first. Of course, Rachel always wins.
by Ann Steely February 03, 2009
Get the mug
Get a bird says stfu mug for your grandma Larisa.