Meanings
From Lewis Carroll's Through the Looking-Glass (1871), where Alice is offered “jam to-morrow and jam yesterday — but never jam to-day”. This is a pun on a mnemonic for the usage of jam, iam in Latin (note i/j conflation in Latin spelling), which means “now”, but only in the future or past tense, not in the present (which is instead nunc).
How to pronounce "jam tomorrow":
AU
Promised benefits that never arrive.
Availability of a resource at a future date.
Example Sentences
1
Don't be fooled by promises of jam tomorrow; focus on what you have today.
2
The politician kept making empty promises of jam tomorrow during his campaign.
3
I'm tired of hearing about jam tomorrow; I want to see results now.
4
The company's CEO always dangles the carrot of jam tomorrow to keep employees motivated.
5
Many people fall for the illusion of jam tomorrow without realizing they are being deceived.