A term used to describe an overly cute person.
'Oh look, it's Joe McElderry off X Factor!'
'JOE!!! You are an iced bun!'
*Nuzzle into his face.*
Spreading your ejaculation along faeces, either your own or someone else's.
I need a nice Iced Bun to cheer me up. Are you up for icing my bun tonight?