dip·stick 
/ˈdɪpˌstɪk/ noun
plural dip·sticks /ˈdɪpˌstɪk/ noun [count] 1 : a long thin piece of metal with marks that are used to show how much of a fluid (such as motor oil) is in a container or an engine 2 informal : a stupid person
▪ Some dipstick cut in front of me on the highway.
▪ Some dipstick cut in front of me on the highway.
