The stomach filler is when you and your partner are making the sex and when she wants to suck your dick, you tell her to close her eyes. When she closes her eyes, she will open her mouth and you turn around and shit down her throat. The stomach filler.
Last night, I gave my girl the stomach filler. I'm single now.
Any food you ritually eat when you're not hungry but feel like eating for no reason.
Ethan: They say carrots are a bad stomach filler because they are surprisingly high in sugar.
Hawke: What's a "stomach filler"?
Ethan: Look it up on Urban Dictionary, you goddamn retard!