a shitwafer is a slightly built shithead. this person is likely very weak physically, but has a big mouth that spews mostly bullshit. they are delicate and hollow.
Shitfacer is a term derived from the actions of one notably unscrupulous, shitfaced, and lascivious, young man that attends college in Newport Rhode Island. The term has been used as an adjective, noun, verb and in a variety of contexts. The term has been extrapolated to include many other prefixes to the suffix "facer". i.e. Stonefacer, Whorefacer, STDfacer, Spicfacer, "____"facer.
"Hey Pat, can you believe what shitfacer did last weekend?"