a person who has grown significant fat rolls around their middle/waist/arms, any part of the body really and who feel the need to sit there with clothes that are far too tight and lean over showing their stretch marks to the world
a saggy maggy is someone who has ate too many burgers or "all the pies" as they say in wigan
From the British words snog and moggie, that kissable kitten who gets soggy from your snogging, and goes wet 'down there,' when there's been a lot of smooching and foreplay. A cute pet-name, when you're texting back and forth, or talking on the phone, and she's a playful kitty; a kitten, a minx, a Snoggy Moggie!
Texting your minx when you've been apart for a few days, and can't wait to ravage her, again - Summoning her inner-Snoggy Moggie:
You: "Geez, babe, your lips are well lush... I've been fantasizing about snogging you all weekend. I can't wait to get home!"
Her: "Oh, I'm nibbling my lips already, at the thought, babe... When's your train get in? Got some treats for ya, hmmm"
You: "Hehe... You're such a snoggy moggie, girl... I'm next stop, be there soon! Loves ya, babe!'