If that was a passing comment from a driver for no other reason other than sounding off...i wouldnt even blink..just think 't0sser'.
We've all had it i guess. I remember cycling up a narrow country village street. Parked cars dictated i ride on the opposing lane. I was well into that manoever when a car came from a side road and started blundering towards me, rather than wait 3 seconds. I leant toward the window as she came beside me and said (didnt shout)...'nice one' sarcastically.
'Fcuk off ya ****' was the reply

from a mother with a child in the back seat

.
Charming !!!. I rode on safe in the knowledge that her life must be full of angst, much more so than me...and smiled, the poor cow.