Top definition
Someone who is always happy and smiley and no matter what always brightens your day.

I know this is literally a fucking cringey definition but oh well.
1: How’s it going it sunny butt? You always make me happy
2: Are you derranged?
by Justicewithtacosandweed August 10, 2018
Get the mug
Get a Sunny butt mug for your Facebook friend Trump.