Noun - One who causes giggles on a daily basis and is known for making others giggle; An action or situation that causes laughter.
Verb - Giggling at a greater intensity than a chuckle but not quite a laugh during which one loses their breath
Paul was a gigglebot at the party; he had everyone laughing their asses off.
When Ian was kicked in the balls; it was a gigglebot, so I started to gigglebot.
The comedian was such a good gigglebot that I giggleboted until I peed my pants.
That gigglebot is such a gigglebot that I'm giggleboting.