I know one male co-worker who giggles like a girl. Some have described it as a pot smoker giggle.
But what I really hate is when someone does something incredibly stupid and then giggles about it. I just don't see what is sooooo funny about being a moron.
I thought up many ways to murder her and dispose of the body undetected; and just knowing I was planning in this way helped, for a while. But, I don't seem killer-material, so I had to think up another strategy.
I started to wear silly hats, and do things and say things that really made her laugh until the day we reached the goal: the day she giggled and laughed so hard she peed her pants.