(at the) peak of mischievousness; little demon (of children)
reconsideration; redeliberation
why-why analysis; method of questioning that leads to the identification of the root cause(s) of a problem
supporting actor; supporting actress
pretending to be more experienced than one actually is; acting as though one is knowledgeable about something
catching fire (from a neighbouring house on fire)
flash point; flashing point
if you know your enemy and know yourself, in a hundred battles you will never be defeated; know your enemy
review work; study; investigation
flare skirt; flared skirt
something intended as a lie or joke which (by chance) ends up being true; lie turned truth
clickbaiting; giving something a misleading title
heavy line (for emphasis); thick line; underline; border
to make worse (e.g. disease); to aggravate; to complicate
expansion pack (for a video game, collectable card game, etc.)
ignoring a text message by leaving it unopened and marked as "unread" (in online chatting)
good (place to leave off); convenient
if one is unlucky; if one is careless
publicist; public relations officer; press agent; propagandist; flack
broadcast marathon; transmitting sequential episodes of a radio or television series
questionnaire; survey; poll
intermittently; at intervals (of); after a pause
boyfriend and girlfriend matters
there's but a fine line between genius and insanity
teetotal day; day off drinking; (lit.) liver rest day
holiday allowance; allowance for working at weekends or on a holiday
Barnum effect; Forer effect
once a fool, always a fool; (lit.) idiots will only be cured when they die
marriage counseling; marital counseling