What it says up there. Use of terms like mad or mental in throwaway comments about (normal or eccentric) behaviour.
"That party last night was mad"
"I went mental when I found out"
"it's bedlam in there"
Edit to fix the line breaks that disappeared when I posted from Android chrome but reappeared when I clicked edit in lite mode. Mad.
Etc.
EDITED: 14 Apr 2014 09:57 by KOSWIX