noun
jerk
JURK/dʒɜːrk/
An obnoxious or contemptible person.
The person acts like a jerk, shoving ahead and spilling another customer's drink.

Etymology
Recorded in American carnival slang for a tedious, ineffectual person, jerk has an uncertain origin. It may derive from jerkwater, 'insignificant,' or derive from or have been influenced by the phrase jerk off.
In context
to be confrontational without being a jerk.
And he was drunk and he was being a jerk in that moment,