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1.
a means to exaggerate yelling ; next-level yelling ; a parody of an individual becoming so excited that yelling must be followed with vomiting to fully express their excitement ; mostly used in a humorous context as an overly-excited reaction to an unexciting situation or event.
" I thought those guys watching the game were totally going to YELLBARF !"

" I need to do the dishes - YEEEAAAHHHBLAAARGHHH ! "

" Yellbarf on tits "
by DOKTOR October 04, 2012