Not have all day
Definition 1 of 1
Pro Tip 1/3Urgency Expression
Indicates a need to act quickly because time is limited or running out. 
Finish your test quickly, you don't have all day.
Pro Tip 2/3Mild Frustration
Suggests the speaker is getting impatient waiting for someone else. 
Come on, decide which movie to watch, we don't have all day.
Pro Tip 3/3Conversational Tone
Used in casual, informal conversations rather than formal settings. 
Hurry up with the ladder, I don't have all day!