Adam Anderson (18) repeatedly spat on a police officer in Seaforth Road, Langlees.
Anderson, 4 Wallace View, Tullibody, admitted the assault and threatening behaviour offence he committed on June 2 last year.
He also pled guilty to stealing food from Redding Tesco on July 27, 2017.
He was placed on a supervised community payback order for 12 months with a review fixed for two month’s time.