fall about

US /fɔːl əˈbaʊt/
UK /fɔːl əˈbaʊt/
"fall about" picture
1.

cair na gargalhada, morrer de rir

to laugh uncontrollably

:
The comedian was so funny, we were all falling about.
O comediante era tão engraçado, estávamos todos caindo de rir.
Every time he told that joke, people would just fall about.
Toda vez que ele contava aquela piada, as pessoas simplesmente caíam na gargalhada.