"That B Movie was awefulsome!"
"Did you see his new toupee? It's awefulsome!"
"I love this nightclub. This place is so tacky it's great! It's awefulsome!"
The opposite of awesomesauce. Similar to weaksauce's relation to strongsauce.
Awfulsauce is getting black olives in your wrap when the menu did not mention black olives. Also, when Sonic advertises 99 cent coney dogs but they charge you something like $1.50