Slops (also known as "paned slops", "pluderhosen", "pumpkin breeches", or, less vulgarly, "round paned hose") are clothing for men. They are short pants, worn over tights or other long pants. They are characterised by being made up of 2, usually contrasting, layers; the inside layer acting as a stuffing to give the characteristic pumpkin shape and the outside layer being made of strips of fabric which let the inner layer peek through.
There arent a lot of resources on slops, but what is available seems fairly high quality.
Read more about Paned Slops
What is this? This is The Garbindex - a guide to making garb for recreationists (ie how to sew clothes that will make you look genuinely medieval, when 'playing' with such groups as the SCA, doing LARP - or even making something really genuine for drama.)
Use these resources to find resources that will help you create clothing that looks great - and real!