I think this is what you want:
on $*:ACTION:/^(giggles at|grins at|laughs at|roars with laughter at) (.+) in (.+)$/:#somechannel:{
if ($nick != cdc) { return }
var %release = $regml(2), %section = $regml(3)
; do stuff here
}
Just modify the list of phrases to include all of the ones that you need to look for.