Doider, (dōy-dur), noun
stemmed the Latin words: "Doidimus Maximus," meaning: big doider.
a protruding stomach or beer belly, typically hanging over the beltline. Doiders are most noticable when fully exposed on a shirtless male.
Doiders aren't always necessarily large and protruding, but only when the word is used as a moniker for ones stomach in the context of self. (i.e. "I'm gonna hit up the Bell and fire a 10-pack of soft-shells into my doider")
in a case where a small stomach is referred to as a doider, the proper label would actually be doi
A large doider shocks John and Brian:
John: "wow, look at the size of that doider!"
Brian: "that doider is epic!"
Darryl is disgusted by a doider/front-butt combo:
Darryl: "the lady's back-breaking doider rolled over her belt, resting on top of her bulging front-butt
Doider can also be used as an adjective:
Kevin: "those pizza rolls were doiderific, I hoovered them shits into my doider."
and as a verb:
Ryan: "did you see that fight between Mark and Tim?"
James: "Tim doidered Mark into the thistles."