For this specific purpose; improvised.
Ad hoc.
Other self.
Alter ego.
Seize the night.
Carpe Noctem.
Often used at the end of a sentence to express "And the rest" or "and so on".
Et cetera (etc.)
Through my fault (my mistake).
Mea Culpa.
To a sickening or excessive degree.
Ad nauseam
Word for word.
Verbatim.
Seize the day.
Carpe Diem.
Therfore.
Ergo.
Per person.
Per capita.
Nourishing mother (your university/school that you graduated from).
Alma Mater
The other way around.
Vice versa
In fact. In reality.
De facto
"That is to say" or "In other words."
Id est. (i.e.)
Per day.
Per diem.
Let the buyer beware.
Caveat Emptor.
Greatest work.
Magnum Opus.
De jure
In memory of.
In memoriam
For the public good (without fee).
Pro bono.
Something for something (an exchange).
Quid pro quo.
The existing state of affairs.
Status quo.
Blank slate.
Tabula Rasa.
A writ (court order) requiring a person under arrest to be brought before a judge or into court.
Habeas corpus.
A writ ordering a person to attend a court or produce evidence, under penalty if they fail to do so.
Subpoena