One day have a bag of Skittles handy.
When she walks up to your desk try and throw one in her cleavage.
If you get it in shout "HEY EVERYONE, I JUST SCORED 20 POINTS!!!" Then run around the office with your shirt over your head.
( Maffers I flow kinda strange like Spina Bifida footprints, Mon 10 May 2010, 19:28, 1 reply)

^^ This
Just ruined the illusion that I'm working right now...
Boss: "snee? what're you laughing at?"
me: "Um...just realised I'd got the code all wrong..."
( snee held his breath since, Wed 12 May 2010, 13:23, closed)