The smack head ridden, flea bitten, scum bag rotten core of an otherwise fairly nice Llansamlet area. Trallwn is known for "Scruffy Mush Heads" look like they all rape their own grandmothers. - All women over 30 have a "Cat bum mouth" (u know a granny smack head mouth with all wrinkles around it) and have crusty knickers stuck up their ass. - they must shop at annorexic-mart or something to find a pair of jeans that can be that tight to a pair or smack head twig legs. Boo for trallwn, it sure it shit.