There's
kaylynn06's Boyfriend Jeans conversions of the H&M men's jeans, they're fairly loose (and I could find them easily). And there's
exportdry's Bigger Boots pants, for teen female only.
I have some excellent really baggy cargo jeans in my game but they're from such a long time ago that I don't have the original
zip file and don't know where they came from. They appear to be a separated bottom version of
this kaylynn06 fullbody outfit and are for child, teen and adult male and female. The mesh names are MESH_(~TA12~)_GPExportD_BaggyPocketPants-BiggerHPBoots_Blend-AF (AM, TF, TM, CU) so I think ~TA12~ might be the creator? They're really neat and I use them a lot, but they sadly don't have fat morphs. Pic attached - does anyone know where these came from?