just a sec(ond)

1. Only a short amount of time. The doctor will be with you in just a second.

2. interjection A request for someone to wait a short amount of time. Just a sec, darling, I'm almost finished. Just a second! I'll open the door as soon as I get dressed.

3. interjection Used to indicate one's desire to address something with which one disagrees or is dissatisfied. Now, just a second! I did nothing wrong, and I won't stand to hear such nasty accusations! A: "So, Bill and Mary, you two will be in the front dealing with customers. Tom, I'll need you to haul the cases from the delivery truck into the warehouse." B: "Hey, just a sec—why do those two get such a cushy job while I get stuck with the heavy lifting?"