gigglesomeadj.

/ˈɡɪɡ(ə)lsəm/Etymology: < giggle v.1 + -some suffix1.
the mind > emotion > pleasure > laughter > types of laughter > [adjective] > giggling > disposed or prone to giggling
1893 M. E. Hullah ii. 66 When you are once gigglesome the least thing sets you off again.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2018).