jam on - definition and synonyms

phrasal verb [transitive]
present tense
I/you/we/theyjam on
he/she/itjams on
present participlejamming on
past tensejammed on
past participlejammed on
  1. jam on the brakes/jam the brakes on to put your foot very suddenly and hard on the brake of a vehicle because you want to stop quickly
See also main entry: jam