The Urban Dictionary T-Shirt. Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton). A ewl is a large beast which mainly consumes petrol and oil but there are some with diets made up from human waste (rubbish). Some adult ewls can way many tones and young ones when they hatch can sometimes be grams, a baby ewl is called a dinky in some countrys.