back talk 
noun
North American term for backchat.He was a bit shocked by my slight back talk....
- When he mentioned his wife, he got the same back talk from Amanda that Kevin had gotten.
- Oh that's the reason for the cursing and the foul back talk, not like he never does it when Jessica's not around.
- leftmost
- left-of-centre
- leftover
- left, right, and centre (also left and right or right and left)
- left turn
- leftward
- left wing
- left-winger
- lefty
- leg
- legacy
- legal
- legal action
- legal advice
- legal age
- legal aid
- legal beagle
- legal capacity
- legal clinic
- legal eagle
- legal entity
- legalese
- legal fiction
- legal high
- legal holiday