When a chick has extra fat in her lower abdomen that stands out against the rest of her body. She looks like she might be pregnant, but she isn't. Speculation occurs that she fucks a lot, hence the gut. Not to be confused with pb or FUPA.
"OMG look at that hot chick with the fuck gut! Sexy. She'll love my monster dick."
by Geno Led July 13, 2009