A euphemism for throwing up.
Dude, this kid in my class got sick and totally rainbow smiled alllll over the room. He couldn't even make it to the bathroom!
viết bởi El Chin Chon 06 Tháng hai, 2009
1 more definition
to smile out of happiness while crying of sadness
she had lost all hope, but love in friendship made her dawn a rainbow smile
viết bởi audiodecoy 04 Tháng tư, 2005