The sarcastic phrase “yeba” (shortened from “yea bro”), is used in disagreeance or disbeliefe to what someone has said
Dylan: “I’ve been going to the gym for like 3 days now, I’m looking pretty big”
Will: “yeaba...”
someone who is, or thinks they are huge
Dan- "oh yea I just started working out at the gym"
Calum- "ohhh big dousa"
Dan- "shut up Calum, I am huge"
Calum- "nah mate, you think your huge"