Vintage straight pin back novelty / ice breaker button.
Possibly late 60s to the late 70s? Approximately 1-1/4 inches in diameter.
There's a mostly illegible makers mark in the center of the back of the button. Although the word "made" is pretty clear, the mark yields little information about this button.
Black on yellow background.
Graphic: A different take on the iconic smiley face symbol, this button features a a frowning mouth, scrunched up eyes and a tongue hanging out. Printed in black.
Text: AH-SHIT self explanatory also printed in black.