say what? #1 jubi-what?

source: Welcome to The Dark House by Laurie Faria Stolarz. page 122

context: the painting was a surprise portrait, done from my moms high school graduation photo, and presented to my mother at the town art show, at witch Margie won honorable mention and mom dissolved into a puddle of jubilant tears.

in their words: feeling or expressing great happiness and triumph.

in my words: to me before i new what the words meant i thought it was like saying she was in awe like “wow. amazing.” that sort of thing. now that i know i would say basically it mean joy.