The check's in the mail spoken language cliché
Payment is on the way or will be sent to you soon. Used as a delaying tactic to avoid the pressure of creditors or someone expecting payment
A: When will you pay the money you borrowed from me? B: The check is in the mail, I swear.
A: You will get a penalty for late payment of bills. B: Oh, sorry for that, the check is in the mail.
save as much money as possible
Used to say that someone attempts to get money from you.
Feeling worried about finance.
To do work of any kind to earn a living
The term was coined in the second half of the 1900s. It was used in a headline in Publishers Weekly (Jan. 31, 2005) concerning a wholesaler's financial problems: "Is Baker & Taylor's Check in the Mail?"