(idiomatic) At the same time as, usually over an extended period.

even less

(typography) Text or a font in which all letters are capital letters.

(set phrase) Alternative form of all of a sudden

(chiefly UK, Ireland) Someone who obnoxiously claims to be knowledgeable on a subject.

(idiomatic) The entire set of persons or things within a given domain, considered both as separate individuals and collectively.

That consumes everything; that uses everything up. / Totally engrossing, using up all of one's time and energy.

(idiomatic) Ruined; bankrupt. / (idiomatic) completely, to the point of destruction.

Alternative spelling of on all fours

(academics) A status of a doctoral student who has completed all PhD degree requirements except the doctoral dissertation.