{adv. phr.}, {informal} In a predicament; in a situation fraught with difficulty. * /If you continue to disregard the university instructions on how to take a test, you'll wind up in a jam with the head of the department./ Compare: IN A PICKLE, IN DEEP SHIT.
IN A JAM
Meaning of IN A JAM in English
Dictionary of English idioms . Словарь английских идиом. 2012